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supposed solution to heat during gaming .

i want to discuss the overlock or underlocking the cpu
so whats the effect on heat generated ????
overlock increase heat or dcrease heat ??
and is undervolting helps to decrease heat generated from the processor ??
many tests mentioned that overlock 1.6 is stable and undervolting scale (200-800) is also stable but non of the testers mentioned the heat effect all are reporting for stability and speed
i suffer from heat during hd games and i know it is normal but i dont want the phone to get hot during gaming i closes the game after around 30 minutes due to this problem

If you want to reduce heat during gaming, then you need to change the 1.2GHz speed (level 0) down to either 1.0GHz or 800MHz. Changing the Level 1 to Level 4 speeds won't solve your problem since your CPU will be at full speed Level 0 during gaming.

Sleepycat3 said:
If you want to reduce heat during gaming, then you need to change the 1.2GHz speed (level 0) down to either 1.0GHz or 800MHz. Changing the Level 1 to Level 4 speeds won't solve your problem since your CPU will be at full speed Level 0 during gaming.
Click to expand...
Click to collapse
srry i dont understand what will make the processor return to full speed 1.2 during gaming ?? if i set it to 1000 or 800 ???

Sleepycat3 said:
If you want to reduce heat during gaming, then you need to change the 1.2GHz speed (level 0) down to either 1.0GHz or 800MHz. Changing the Level 1 to Level 4 speeds won't solve your problem since your CPU will be at full speed Level 0 during gaming.
Click to expand...
Click to collapse
No that's just bull****. Go play around a few games and have CPU Spy running and after a gamsing session check the CPU states, rarely does a game go over 800MHz and most of the time spent is on 500MHz for most games. There aren't any games out there that need the computational power of higher frequencies and that's why their time-in-state is procentually so low.
If you really want to reduce heat, then you need to undervolt your GPU which right now is only possible with a Tegrak compatible kernel, which is frankly speaking out of date, or you wait a few weeks until the Ninphetamine team finishes GPU voltage control interface and then more kernels will be able to implement that.
While undervolting with Tegrak I was running 160MHz/750mV 266MHz/750mV full stable (default voltage 950/1000mV, 750 was minimum configurable). It was running full stable and while on default the back of the phone would get really hot, while undervolted it was just warm to the touch.

AndreiLux said:
No that's just bull****. Go play around a few games and have CPU Spy running and after a gamsing session check the CPU states, rarely does a game go over 800MHz and most of the time spent is on 500MHz for most games. There aren't any games out there that need the computational power of higher frequencies and that's why their time-in-state is procentually so low.
If you really want to reduce heat, then you need to undervolt your GPU which right now is only possible with a Tegrak compatible kernel, which is frankly speaking out of date, or you wait a few weeks until the Ninphetamine team finishes GPU voltage control interface and then more kernels will be able to implement that.
While undervolting with Tegrak I was running 160MHz/750mV 266MHz/750mV full stable (default voltage 950/1000mV, 750 was minimum configurable). It was running full stable and while on default the back of the phone would get really hot, while undervolted it was just warm to the touch.
Click to expand...
Click to collapse
so is there any effect on device performance ????
after undervolting the hd games performs properly as stock ?? and without heat ?? if yess i will root now and see what can i do
and how can i know that my kernel is tegrak compatible ?? it is kg2

Changing voltage has no effect on performance unless you undervolt into unstable values and make it crash. Stock should be compatible with Tegrak (I think???). Just check out the free app in the market. The stupid thing is you need to pay for the full version to get GPU control and that's why it's unpopular, so maybe it's just better to wait for Ninphetamine GPU control in a couple of weeks or soonish and have it for free and get a good kernel to go with it.

AndreiLux said:
Changing voltage has no effect on performance unless you undervolt into unstable values and make it crash. Stock should be compatible with Tegrak (I think???). Just check out the free app in the market. The stupid thing is you need to pay for the full version to get GPU control and that's why it's unpopular, so maybe it's just better to wait for Ninphetamine GPU control in a couple of weeks or soonish and have it for free and get a good kernel to go with it.
Click to expand...
Click to collapse
thanks bro
but i think i have small thing that confuse me undervolting is different from downlock ??
and what is the relation between them ??? i think certain volt will give related amount of "Mhz" ?? is that right ??? so set cpu is the same effect as tegrak or what ??
srry im new to android

xdafun4all said:
thanks bro
but i think i have small thing that confuse me undervolting is different from downlock ??
and what is the relation between them ??? i think certain volt will give related amount of "Mhz" ?? is that right ??? so set cpu is the same effect as tegrak or what ??
srry im new to android
Click to expand...
Click to collapse
Tegrak, basically gives you more options such as GPU clocking and custom tweaks. SetCPU is ok, but I just use it for controlling clock speeds. Also, you can set oc'ing, max at 2GHZ, but you have to play around with stuff.

Use a very thin case and you'll never notice.
Sent from my GT-I9100 using XDA App

AndreiLux said:
No that's just bull****. Go play around a few games and have CPU Spy running and after a gamsing session check the CPU states, rarely does a game go over 800MHz and most of the time spent is on 500MHz for most games. There aren't any games out there that need the computational power of higher frequencies and that's why their time-in-state is procentually so low.
Click to expand...
Click to collapse
Sure. I just fired up Plants vs Zombies, which is not the world's most demanding Android game and played 1 quick game, taking about 10 minutes. While playing, the back of the phone just where the camera is became warm through the phone case! Tell me why I have the phone running at 1200MHz for such a big portion of time if my post is just bull****. This was also the Last Stand level, where you get a pause in the middle of the attacks to replant.
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Sleepycat3 said:
Sure. I just fired up Plants vs Zombies, which is not the world's most demanding Android game and played 1 quick game, taking about 10 minutes. While playing, the back of the phone just where the camera is became warm through the phone case! Tell me why I have the phone running at 1200MHz for such a big portion of time if my post is just bull****. This was also the Last Stand level, where you get a pause in the middle of the attacks to replant.
http://img825.imageshack.us/img825/5459/sc20110829170728.png
Click to expand...
Click to collapse
35% of time on full speed does not equal all the time on full speed like you said in your first post. It's still 50% on either 800 or 500MHz like I said. And you took a bad example as I dont even know if PvsZ is even using properly the GPU, and then might use only the CPU. Go play Gameloft HD games which are the most demanding atm and max CPU ratio to the rest falls down.

AndreiLux said:
35% of time on full speed does not equal all the time on full speed like you said in your first post. It's still 50% on either 800 or 500MHz like I said. And you took a bad example as I dont even know if PvsZ is even using properly the GPU, and then might use only the CPU. Go play Gameloft HD games which are the most demanding atm and max CPU ratio to the rest falls down.
Click to expand...
Click to collapse
so what ??? at the end undervolting will help or not ???
i need it for hd games
and if the cpu need to be at 50% of time so it need to use 1200 mhz 50 of time so if we fixed it to 800 or 1000 or 500 this will affect performance

no heat issues
I have ninphetamine kernel, underclocked to 800 and undervolted, I haven't noticed any heat issues since then when playing games and noticed no slow downs. Games tried: HeavyGunner, Zenonia 3. Also no heat issues anymore when playing flash video in a browser.

wslfung said:
I have ninphetamine kernel, underclocked to 800 and undervolted, I haven't noticed any heat issues since then when playing games and noticed no slow downs. Games tried: HeavyGunner, Zenonia 3. Also no heat issues anymore when playing flash video in a browser.
Click to expand...
Click to collapse
but sorry these games are not using graphics as eternal legacy or asphalt 6 hd or fast 5 hd

really it works
i rooted then set cpu then put the values 200-800 and asphalt 6 worked around 20 minutes no heat at all only slight warm
and the benchmark only decresed from 3300 to 2750

My battery is now just terrible.

I have had data on for a huge chunk of this time and played shadow gun for 10 minutes. I'm over locked to 1300 Max 800 Min on ondemmand. Auto brightness, disabled auto sync, and all the other tricks you can think of. With data off I can pull off an extra 6 hours without games. What is this horse s**t?
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P.S. It died 3 minutes after posting this... And that black space is from my phone randomly rebooting on me... And then failing the first boot animation (as usual), re-rebooting itself and then finally, after getting by the second boot animation it turned on.
Nexus S - CyberGR Hybrid ICS (5), Matrix Kernel (15.5)

Try Eugene kernel with luzuactive. I am having good battery life with that.
Sent from my Nexus S using xda premium

That seems fairly normal to me on ICS; maybe even better than what I can get. I can only get about 2.5 hours of on screen time + 20 hours idling.
You have about 4 hours on on screen time and no idling. Seems about right.
However on Gingerbread you could probably pull off more on-screen usage.

herzlich said:
Try Eugene kernel with luzuactive. I am having good battery life with that.
Sent from my Nexus S using xda premium
Click to expand...
Click to collapse
Does NS Tools work with that? I want to keep my BLN and Deep Idle . And can you point me in the direction of the kernel
***** EDIT: Nvm found it, going to try it. It does work with NS Tools says the dev and users of the ROM
AeroEchelon said:
That seems fairly normal to me on ICS; maybe even better than what I can get. I can only get about 2.5 hours of on screen time + 20 hours idling.
You have about 4 hours on on screen time and no idling. Seems about right.
However on Gingerbread you could probably pull off more on-screen usage.
Click to expand...
Click to collapse
I was able to get a lot more out of it a week ago... The same things I do now I could do for 4-7 (+some off screen use...) hours, off screen would be MUCH better... It just suddenly stopped being good. ICS wasn't always this bad lol

For starters your min is 800 MHz.... What the heck?! Who needs that? I'm sure that and being OC'd to 1300 hurts too.

MrDrumngun said:
For starters your min is 800 MHz.... What the heck?! Who needs that? I'm sure that and being OC'd to 1300 hurts too.
Click to expand...
Click to collapse
So should I drop all the way down to 100, or go for 200 or 400? 100 seems blegh to me. I'm thinking of 200? I am however keeping the 1300 . If I must I'll go down to 1200.

Kernel is definitely not the problem. I've ran matrix before and its had some of the best battery life.
Problem is with your 800mhz min. You definitely don't need that. Run it at 200 and the difference won't be that significant.
Sent from my Nexus S using xda premium

moneybag said:
Kernel is definitely not the problem. I've ran matrix before and its had some of the best battery life.
Problem is with your 800mhz min. You definitely don't need that. Run it at 200 and the difference won't be that significant.
Sent from my Nexus S using xda premium
Click to expand...
Click to collapse
Okay thanks . So I'm going to go for 1200 / 100 on the speedy 7 kernel (lulzactive)... Good? If it works out eventually I'll switch back to Matrix 15.5 and see the difference. I've heard Trinity is very good
Just waiting on a full charge will post results when they come in. I'll be doing some very heavy usage because that's what I'm concerned about.
P.S. I've enabled Auto-Brightness after "re-thinking" the advantages to it in terms of battery use + screen visibility.

With smartassv2/sio on CyberGR & Eugene kernel I'm getting the best battery performance I've had ever since I put on ICS. At this rate I can hit 3 days idling. With heavy usage, probably 6-8 hours? Try it.

deetailed said:
With smartassv2/sio on CyberGR & Eugene kernel I'm getting the best battery performance I've had ever since I put on ICS. At this rate I can hit 3 days idling. With heavy usage, probably 6-8 hours? Try it.
Click to expand...
Click to collapse
I'll try it on lulzactivev2 first. Isn't lulactivev2 better than smartassv2 ? Every site I go to with information regarding governors tells me something else lol. Except ondemand that's the only one that has had a consistent definition.

Sent from my Nexus S using XDA App

Set min freq to 200 first off. 800 min is way too high if you want to save battery.
Secondly leave deep idle turned off, it doesn't do anything on ics.
check out bedalus battery drain comparison.
I get around 4 hours of screen on time for about 12-14hrs on battery.
I also undervolt more than the kernels are already undervolted.

nodstuff said:
Set min freq to 200 first off. 800 min is way too high if you want to save battery.
Secondly leave deep idle turned off, it doesn't do anything on ics.
check out bedalus battery drain comparison.
I get around 4 hours of screen on time for about 12-14hrs on battery.
I also undervolt more than the kernels are already undervolted.
Click to expand...
Click to collapse
I already have a 100 min on-going so I don't want to mess up the test . Afterwards I'll do 200. As for deep idle the option on my NS Tools has mysteriously vanished so I won't be able to enable it either way . I'm not going to touch under voltage I don't know much about over clocking (besides it speeds up your phone) as is. Lol rather not get into another hole

309041291a said:
I already have a 100 min on-going so I don't want to mess up the test . Afterwards I'll do 200. As for deep idle the option on my NS Tools has mysteriously vanished so I won't be able to enable it either way . I'm not going to touch under voltage I don't know much about over clocking (besides it speeds up your phone) as is. Lol rather not get into another hole
Click to expand...
Click to collapse
I read somewhere that 200 is better than 100 bit the only way to know is to try it out!
That's coz speedy doesn't have deep idle. Nstools doesn't show options the kernel doesn't have.
Well if you wanna try undervolting just uncheck set at boot in nstools.
Then search for stock nexus s voltages and see what they are and then look see what yours are and work from there.
The worst that will happen is that your phone will reboot but it will boot into the kernels stock voltages because you unchecked set at boot! No harm done!

Are you running the kernel with the 65 fps hack or no?
Sent from my Nexus S using XDA App

800mhz min?!?!
wow.
if anything, that should be your MAX speed...
I'm running 1000mhz max 100min with smartassv2 on the latest matr1x kernel and it lasts all day with pretty heavy use

nodstuff said:
I read somewhere that 200 is better than 100 bit the only way to know is to try it out!
That's coz speedy doesn't have deep idle. Nstools doesn't show options the kernel doesn't have.
Well if you wanna try undervolting just uncheck set at boot in nstools.
Then search for stock nexus s voltages and see what they are and then look see what yours are and work from there.
The worst that will happen is that your phone will reboot but it will boot into the kernels stock voltages because you unchecked set at boot! No harm done!
Click to expand...
Click to collapse
Haha very true! Will do . Already I am not noticing the mass heat emitting from my phone (1200/100).
mathkid95 said:
Are you running the kernel with the 65 fps hack or no?
Sent from my Nexus S using XDA App
Click to expand...
Click to collapse
Umm I'm not sure :S? How do I check?
derekwilkinson said:
800mhz min?!?!
wow.
if anything, that should be your MAX speed...
I'm running 1000mhz max 100min with smartassv2 on the latest matr1x kernel and it lasts all day with pretty heavy use
Click to expand...
Click to collapse
Haha, yeah I had originally intended for epic speed. I soon realized it wasn't worth it (my quadrant scores are only 300-500 lower now...). Oh wow. Well hopefully these new settings and governors will help me!

When did you download the zip?
Maybe you can post the mediafire link of the one you downloaded?
Sent from my Nexus S using XDA App

mathkid95 said:
When did you download the zip?
Maybe you can post the mediafire link of the one you downloaded?
Sent from my Nexus S using XDA App
Click to expand...
Click to collapse
I downloaded the ZIP today so it would be the most recent download link (if that helps).

Yeah you're good then..
Just follow nodstuff's advice and lemme know what happens!
Sent from my Nexus S using XDA App

Faux Kernel question.

Can anyone provide me with an explanation and solution for this problem my N4 is having with Faux's kernel? For some reason when I OC my N4 to 1.8ghz, it runs fine with no problem, but when my N4 enters sleep mode, the device completely freezes and the screen won't turn on or respond. I end up having to force it to shut down by holding the power button and restarting it lol...

Sunohara said:
Can anyone provide me with an explanation and solution for this problem my N4 is having with Faux's kernel? For some reason when I OC my N4 to 1.8ghz, it runs fine with no problem, but when my N4 enters sleep mode, the device completely freezes and the screen won't turn on or respond. I end up having to force it to shut down by holding the power button and restarting it lol...
Click to expand...
Click to collapse
try to upscale the min freq a little bit.

That's pretty normal for an unstable device. You might want to play with voltages a bit.
Sent from my Nexus 4 using XDA Premium 4 mobile app

korockinout13 said:
That's pretty normal for an unstable device. You might want to play with voltages a bit.
Sent from my Nexus 4 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
opssemnik said:
try to upscale the min freq a little bit.
Click to expand...
Click to collapse
So what exactly is causing this issue? From both of your answers it seems that when it enters sleep mode it undervolts and as a result it becomes unstable because there's not enough energy to manage the CPU when it's at 1.8ghz? Or is it crashing because there" too much of a difference between the minimum and maximum frequencies?

Sunohara said:
So what exactly is causing this issue? From both of your answers it seems that when it enters sleep mode it undervolts and as a result it becomes unstable because there's not enough energy to manage the CPU when it's at 1.8ghz? Or is it crashing because there" too much of a difference between the minimum and maximum frequencies?
Click to expand...
Click to collapse
some nexus still comes with the rev1 or 2 of the snapdragon s4 pro. those have problems with deep sleep modes that faux uses.

opssemnik said:
some nexus still comes with the rev1 or 2 of the snapdragon s4 pro. those have problems with deep sleep modes that faux uses.
Click to expand...
Click to collapse
So how should I go about fixing this? O.O

disable c2 sleep state and then try

Sonoo said:
disable c2 sleep state and then try
Click to expand...
Click to collapse
I'm using trickstor mod right now, where do I go to disable this option?

Sunohara said:
I'm using trickstor mod right now, where do I go to disable this option?
Click to expand...
Click to collapse
yo need to use faux app

opssemnik said:
yo need to use faux app
Click to expand...
Click to collapse
Okay, I just installed the Faux123 Enhancement app, and in my "CPU Idle and Statistics" section I see C0, C1, C2 and C3. Only C1 is turned on though.

then you need to manage voltages

Sunohara said:
Okay, I just installed the Faux123 Enhancement app, and in my "CPU Idle and Statistics" section I see C0, C1, C2 and C3. Only C1 is turned on though.
Click to expand...
Click to collapse
unninstall trickster.do a test without any modification to the original kernel config and see if it still happens.

opssemnik said:
unninstall trickster.do a test without any modification to the original kernel config and see if it still happens.
Click to expand...
Click to collapse
It doesn't seem to occur anymore thanks a million, however there's something else that is going whack now lol.... For some reason it seems whenever I turn off "mpdecision", it always turns back on when I reboot my N4. My other settings stick and only the "mpdecision" reverts back to being on. Same goes for "Snake Charmer", it always goes back to "off" when I reboot device. I set everything to "set on boot" too.

hm,do you are setting these values on trickster?
Enviado de meu C6802 usando Tapatalk

opssemnik said:
hm,do you are setting these values on trickster?
Enviado de meu C6802 usando Tapatalk
Click to expand...
Click to collapse
No, I uninstalled Trickster and got the Faux123 enhancement application as you instructed. But yeah, for some reason "mp decision" and "Snake Charmer" will revert back to default whenever I reboot my device. My other settings that I have changed do stay though, so I'm not sure why only those two options reset themselves when the others don't.

If you put set on boot they will stick a few seconds after reboot, you have to wait a few.
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These are from my N5 but i used the same settings as N4, of course 384MHz should be the lowest you want.
Sent from my Nexus 5 using Tapatalk

UZ7 said:
If you put set on boot they will stick a few seconds after reboot, you have to wait a few.
These are from my N5 but i used the same settings as N4, of course 384MHz should be the lowest you want.
Sent from my Nexus 5 using Tapatalk
Click to expand...
Click to collapse
Did you change any of the voltages on your N4 when you overclocked it? My N4 still seems to sometimes freeze and crash in sleep mode while its over clocked to 1.8ghz. While it's on it never crashes or has any problems.

Sunohara said:
Did you change any of the voltages on your N4 when you overclocked it? My N4 still seems to sometimes freeze and crash in sleep mode while its over clocked to 1.8ghz. While it's on it never crashes or has any problems.
Click to expand...
Click to collapse
I only used mainstream so it was stock 1.5Ghz but I had it at -100mV and the binning was fast. Did you change any of your cpu idle/stat settings?
Sent from my Nexus 5 using Tapatalk
---------- Post added at 02:03 AM ---------- Previous post was at 01:57 AM ----------
http://forum.xda-developers.com/showthread.php?p=34502823 try the settings on here. I disabled only C2 rest are on.
Sent from my Nexus 5 using Tapatalk

UZ7 said:
I only used mainstream so it was stock 1.5Ghz but I had it at -100mV and the binning was fast. Did you change any of your cpu idle/stat settings?
Sent from my Nexus 5 using Tapatalk
Click to expand...
Click to collapse
Currently, I have C0, C2, and C3 enabled. I know that these sleep mode crashes are related to the SOC control but I can't seem to find what I have to enable and disable. The voltage most likely has a role in it too, but I'm not sure which "things" voltage I have to change. I keep getting these dodgy replies saying to change my voltages but they dont tell me what voltage I have to change. Am I supposed to raise the voltage on the 1.8ghz or what? It's like someone telling me to punch someone, but who?

Sunohara said:
Currently, I have C0, C2, and C3 enabled. I know that these sleep mode crashes are related to the SOC control but I can't seem to find what I have to enable and disable. The voltage most likely has a role in it too, but I'm not sure which "things" voltage I have to change. I keep getting these dodgy replies saying to change my voltages but they dont tell me what voltage I have to change. Am I supposed to raise the voltage on the 1.8ghz or what? It's like someone telling me to punch someone, but who?
Click to expand...
Click to collapse
Oops I'm on my desktop now, had to reread.
Pretty much my phone was on "m" meaning mainstream = stock 1.5GHz.
The "u" one is the one with 1.8GHz.
That being said undervolting is best applied to lower clocks and for battery saving.
Since the 1.5GHz is what the default max clock for the N4 it has a table range of voltages. Each one may be different depending on binning meaning some might be at 800mV and another at 775mV (just an example) for a given clock like say 384MHz, 400MHz, 500MHz etc...
When people say did you change voltages, since 1.8GHz is technically an overclock you may or may not need to adjust voltages to compensate the need for more power. If the voltages are too low it will either reboot or crash/wont turn back on. Similar things apply to overclocking CPUs on desktop.
So since 1.8GHz isnt within stock spec it is considered an overclock therefore it may need more voltages and that can be adjusted.
I would download the latest faux123 kernel and reapply it and start from the beginning. Then if it keeps crashing you may need to apply more voltage and I think they go by 12.5mV.
---------- Post added at 02:17 AM ---------- Previous post was at 02:13 AM ----------
This is from my N5 and this is considered undervolting.
Sent from my Nexus 5 using Tapatalk

Undervolting drastically improves 4K video recording?

I've been fooling around with undervolting CPU frequencies for the past few weeks and I've noticed that it improves 4K video recording remarkably.
.402 firmware has something to do with it too since 4K video has been underclock to 800mhz rather then 1ghz on previous firmwares.
As you can see from the sceenies below I got 34mins of 4K which was about a 13GB file. Phone was also not very hot, I would say very warm.
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I can't remeber how much I undervolted from default, so I've uploaded some screenshots of my undervolts below
*NOTE* that the important frequency to undervolt would be 800mhz since that is frequency it is locked at while using 4K video recording on .402 firmware. .69 firmware and lower would lock the frequencies at 1ghz so you would undervolt the 1ghz frequency.
I cannot confirm all this as I'm the only one I know that has tested it. I will need others to try and see if they get better results then they had previously, you don't need to get 30mins for good results. I just want to know if it improves 4K for you guys or if its still the same.
*NOTE* not all phones are made the same, some phone might not be able to undervolt as much as others and may cause your phone to slowdown or reboot.
*UPDATE* did some more tests to see the temperature and if I could do back to back recordings, these were the results
36mins >>
30mins >>
As you can see from the time difference in the screenshots there was less then 1min difference, this is because I went into system monitor to check the temperature before I started the next recording. Max temp was 44c and the current temp was 42c. Seems like I could do back to back recordings endlessly, the reason I didn't do more was because I had low battery at the time and 66mins of 4K recording drained about 45% or more of my battery.
*NOTE* Weather plays an important factor and it is winter here, my first recording was done @ 11C, the 2nd and 3rd ones where done @ 16c

I can conform it as it's logical, the camera shuts down due to overheating so less voltage means less heat obviously
Sent from my D6503 using Tapatalk

Mr.R™ said:
I can conform it as it's logical, the camera shuts down due to overheating so less voltage means less heat obviously
Sent from my D6503 using Tapatalk
Click to expand...
Click to collapse
Yeah, I understand it's logical and I was referring to the drastic impact it seemed to have for me. I haven't really noticed anyone confirming that 4K video is better on .402 since it should be because 4K is underclock from 1ghz to 800mhz.

Would be good to test the temperature differences really, see how far it is below the threshold once undervolted, I'm - 36 on all steps so I may test later busy with kids atm tho
Sent from my D6503 using Tapatalk

Pesetio said:
I've been fooling around with undervolting CPU frequencies for the past few weeks and I've noticed that it improves 4K video recording remarkably.
.402 firmware has something to do with it too since 4K video has been underclock to 800mhz rather then 1ghz on previous firmwares.
As you can see from the sceenies below I got 34mins of 4K which was about a 13GB file. Phone was also not very hot, I would say very warm.
[...]
*NOTE* that the important frequency to undervolt would be 800mhz since that is frequency it is locked at while using 4K video recording on .402 firmware. .69 firmware and lower would lock the frequencies at 1ghz so you would undervolt the 1ghz frequency.
I cannot confirm all this as I'm the only one I know that has tested it. I will need others to try and see if they get better results then they had previously, you don't need to get 30mins for good results. I just want to know if it improves 4K for you guys or if its still the same.
*NOTE* not all phones are made the same, some phone might not be able to undervolt as much as others and may cause your phone to slowdown or reboot.
Click to expand...
Click to collapse
It seems to be a good point. Does the bitrate remain the same when you are undervolting & underclocking your XZ2 ?
I don't know if the cpu is used for 4K encoding or if it's a special processing unit.
We can't lock the cpu frequencies without root ...
Sony should lock cpu power when the camera application is used because 1080p @60fps and numerous shot at 20.7mpix turn it into oven.:crying:

yeah it makes complete sense. the chipset will be using less voltage and current, wich means less power. less power = less heat
in my desktop core i7 4770k for example, if i undervolt 120mv from the original voltage, i can get like 13C diference in temperatures

Which app do you use to undervolt your phone?

Rilavalon said:
It seems to be a good point. Does the bitrate remain the same when you are undervolting & underclocking your XZ2 ?
I don't know if the cpu is used for 4K encoding or if it's a special processing unit.
We can't lock the cpu frequencies without root ...
Sony should lock cpu power when the camera application is used because 1080p @60fps and numerous shot at 20.7mpix turn it into oven.:crying:
Click to expand...
Click to collapse
The CPU basically has 100% usage on all 4 cores when it's recording in 4K, I'm not sure about the GPU but when I have underclocked the GPU to 200MHz, after 4K video recording it defaults back to the 575Mhz.
Mano1982 said:
Which app do you use to undervolt your phone?
Click to expand...
Click to collapse
You need to have doomkernel 6 or above installed. If you have Romaur, it comes with a default app (Performance Control). You can use Fauxclock, SetCPU etc..

Pesetio said:
I've been fooling around with undervolting CPU frequencies for the past few weeks and I've noticed that it improves 4K video recording remarkably.
Click to expand...
Click to collapse
have you done any stress testing ?
How is the stability. This will take time to assess.

One Twelve said:
have you done any stress testing ?
How is the stability. This will take time to assess.
Click to expand...
Click to collapse
Not really however it was getting a stress test @ 800Mhz frequency, since 4K recording stresses the CPU and that is for over 30mins and I have had now slowdowns, glitches or reboots since my undervolts.

Pesetio said:
I've been fooling around with undervolting CPU frequencies for the past few weeks and I've noticed that it improves 4K video recording remarkably.
Click to expand...
Click to collapse
Do you recall the surrounding ambient temperature under which you got this performance ?

One Twelve said:
Do you recall the surrounding ambient temperature under which you got this performance ?
Click to expand...
Click to collapse
11c
However I did another test that was done at 16c where I got 36mins, checked the CPU temperature, max 44c, current 42c then I went straight into 4K again and to my surprise I got 30mins.
44c must be the cutoff temperature, what was surprising is that from 42c to 44c took my phone half an hour of 4K recording to reach.
Seems like I could keep doing 30+ mins of 4K endlessly. Obvious battery goes down hard, 66mins of 4K was 45% battery drain.
It's winter here in Melbourne now so obviously that plays an important factor. I'll have to edit original post to include these factors so it doesn't mislead people.

* note
every CPU is slightly different some can handle more undervolt than others ( much like an overclock ) so YMMV with how far you can push the UV.
and hiyo from the west coast (perth) @One Twelve
pvy.

Pesetio said:
11c
However I did another test that was done at 16c where I got 36mins, checked the CPU temperature, max 44c, current 42c then I went straight into 4K again and to my surprise I got 30mins.
44c must be the cutoff temperature, what was surprising is that from 42c to 44c took my phone half an hour of 4K recording to reach.
Seems like I could keep doing 30+ mins of 4K endlessly. Obvious battery goes down hard, 66mins of 4K was 45% battery drain.
Click to expand...
Click to collapse
oh no, i was so hoping it was warmer when you did that test.
11c or 16 c is 20 degrees lower than where i am.
What this means is the Z2 will at least be able to match the rest unlike presently when it comes to heating.
Stabilisation causes faster heating because its resource intensive. Z2 matched the lumia 920 which is some feat but it won't be able to record for as long unless ambient temperatures are 10-20 degrees. At those temps camera works longer by a significant margin over stock. Even at elevated ambient temperatures I expect there will still be an improvement. P =V^2/R and all.
The next question i have is by how much is cpu performance affected say in benchmarks as a result of under volting ?
Pesetio said:
It's winter here in Melbourne now so obviously that plays an important factor. I'll have to edit original post to include these factors so it doesn't mislead people.
Click to expand...
Click to collapse
yes, would make things more clear.

One Twelve said:
Stabilisation causes faster heating because its resource intensive.
Click to expand...
Click to collapse
I was curious so I did another test, I enabled and disabled and didn't really notice any difference in CPU usage however when I did the test I noticed that the CPU cores are clocked @ 1.2ghz now but uses less CPU. Higher clock with less CPU usage seems to be better then lower clock with more CPU usage.
I have been on Romaur 3.0 which is also .402 and it was locked @866mhz and all the CPU cores were at 98 - 100 usage. Very strange indeed.
I have noticed some strange things though from prevous versions, such as being able to under or overclock each individual CPU core and have the settings always stick which I could not do before. Maybe it's because I updated to Doomkernel 9 but I'm not sure.
Have you got the system monitor app with the floating notifcation? I'd like to know what your 4K video is running @ and what kind of CPU usage u get.
I'm on Romaur 3.1 and Doomkernel 9

Pesetio, i don't have a Z2 yet. But am watching developments on it. Your work here is very promising :victory:

One Twelve said:
Pesetio, i don't have a Z2 yet. But am watching developments on it. Your work here is very promising :victory:
Click to expand...
Click to collapse
Ahh ok I thought you had one lol
You'll enjoy it when you do though
For others who do have the phone it would be interesting to know the CPU frequency that you 4K records in and what the CPU usages are, might be able to pinpoint the problems with 4K recording.
The only program I know of that has floating notification is System Monitor (paid version), I'm sure there is a free program that does this though I'm not sure myself.

had that issue.i have underclocked my CPU to 1.7 per core. after that i filmed 15 minute file, rec was stopped beacause my sd is full.

Pesetio said:
Ahh ok I thought you had one lol
You'll enjoy it when you do though
Click to expand...
Click to collapse
Initial impression

progressfx said:
had that issue.i have underclocked my CPU to 1.7 per core. after that i filmed 15 minute file, rec was stopped beacause my sd is full.
Click to expand...
Click to collapse
Good to see that it worked for you, I think undervolting plays a part but the CPU usage when recording 4K plays a major part, if you get very high CPU usage your phone will heat up very quickly and you won't get long recordings, however if you get low CPU usage (even @ high frequencies) you will get very long video recordings and phone will not be too hot.
One Twelve said:
Initial impression
Click to expand...
Click to collapse
I saw your post, it's actually better to record to the internal storage because it's apparently faster, however all of my tests were conducted onto the externalSD.
I did some more tests, this time I turned on my heater to try to recreate a hot climate lol.
I had the phone running @ 1.6ghz with the floating CPU notification on top and heater blowing hot air (1 notch down from max) from about a meter away. The CPU usage was quite low, so I immediately new that the recording would go on for at least 30mins which is did. Phone didn't feel any hotter then usual. And like usual I could go on and record 4K again straight after for 30+mins.
I'm confident to say that it is the CPU usage that is the main culprit. High CPU usage @ lower frequency will not get a long recording compared to low CPU usage @ higher frequency.
Just check the CPU usage when recording 4K and you will know right away if you are going to get good or bad results.
I know there is a mod that increases the heat threshold but personally I wouldn't use it since the threshold is there for a reason.

Major Speed Increase

I have noticed this phone underperforms compared to other Snapdragon 821 devices and I have found a method to majorly increase the speed of this device.
After the following changes the device remains running at cool operating temperatures and performance is increased over the board about 50%
Doing these changes will disable the useless thermal limits set by Xiaomi on this device. Xiaomi set the limits far to low unlike other manufacturers.
The device still has hardware thermal protection by Qualcomm so there is no chance these changes will damage your device.
Your will need:
ES File Explorer
Kernal Auditor
Root Access
Open ES File Explorer and navigate to System/etc
Scroll to the bottom and find file thermal-engine-8996.conf
Copy this to your sd card for a backup and delete this file. ( This will not take effect immediately )
Go to Kernal Auditor and change the big core CPU Governor to OnDemand and set the Maximum CPU frequency to 2150MHz.
Set the LITTLE core CPU Governor to interactive and Max Frequency to 1593MHz.
Go to GPU and change the GPU Max Frequency to 560MHz.
Restart your device for these changes to take effect, the changes are astounding and matches the performance of a stock Snapdragon 835 device while still running at standard operating temperatures.

are u sure, we will have same thermal sensation ? i mean in hand ?

Wont it make the device very hot and will have very fast battery drain?
Sent from my Xiaomi MIX using XDA Labs

The device doesn't get any hotter than usual with these settings.
It is important to under clock a bit so it can keep this sustained performance without breaching it's thermal limits.
The performance gains are very noticeable especially with Dolphin and PPSSPP.
You can see how hot the device gets with Kernal Auditor. Compare the heat listings before the changes and after these are done to check for yourself.
As long as you use these settings the device will not get hotter than stock.

omerbagi10 said:
Wont it make the device very hot and will have very fast battery drain?
Sent from my Xiaomi MIX using XDA Labs
Click to expand...
Click to collapse
The device doesn't get hot if you underclock the cores and battery life is even better because you are underclocking the GPU and LITTLE core which don't need to go up to 2.1GHz for standard tasks.

NGP-1001 said:
The device doesn't get hot if you underclock the cores and battery life is even better because you are underclocking the GPU and LITTLE core which don't need to go up to 2.1GHz for standard tasks.
Click to expand...
Click to collapse
So there are no downsides? :silly:
Sent from my Xiaomi MIX using XDA Labs

There are always down sides to system modifications that haven't been extensively tested, his mileage may not be what you get - be very careful changing core restrictions / settings.

I find there can be considerable variation based on the ROM. I have found EPIC to give the most consistent results. By results I mean Antutu, since general performance is hard to measure.
I set the cores to their max and the boost frequencies to max too. Governor is on demand for both. Response after touch is set to 100ms. In the thermal settings I have Temperature Throttle on and the GPU governor to performance. I get 155k In Antutu almost every pass. Sometimes it'll top 160k, other times down to 150k.
I don't care about the heat since I almost always use the included case and I'm not concerned with battery life. The main thing that still bugs me is the temp figure in Kernel Auditor. It'll show high 60s after Antutu, but other temp apps like CpuTemp show it never gets above 45C. What does your temp get up to?
From what I've read, even in the 60C+ range it's still within safe/reasonable working temps for the CPU. I've used these settings for around two weeks​ and I've gone out of my way to game when I rarely did before (sometimes 1-2 hours in PPSSPP which taxes it). Never had it freeze/lock/reboot once. My Nexus 6 would occasionally do that when I had it pushed to the limit.
If I didn't use the case then I probably would back off it a little as you have outlined as the temps when holding the bare phone can be pretty hot.

gavin19 said:
I find there can be considerable variation based on the ROM. I have found EPIC to give the most consistent results. By results I mean Antutu, since general performance is hard to measure.
I set the cores to their max and the boost frequencies to max too. Governor is on demand for both. Response after touch is set to 100ms. In the thermal settings I have Temperature Throttle on and the GPU governor to performance. I get 155k In Antutu almost every pass. Sometimes it'll top 160k, other times down to 150k.
I don't care about the heat since I almost always use the included case and I'm not concerned with battery life. The main thing that still bugs me is the temp figure in Kernel Auditor. It'll show high 60s after Antutu, but other temp apps like CpuTemp show it never gets above 45C. What does your temp get up to?
From what I've read, even in the 60C+ range it's still within safe/reasonable working temps for the CPU. I've used these settings for around two weeks​ and I've gone out of my way to game when I rarely did before (sometimes 1-2 hours in PPSSPP which taxes it). Never had it freeze/lock/reboot once. My Nexus 6 would occasionally do that when I had it pushed to the limit.
If I didn't use the case then I probably would back off it a little as you have outlined as the temps when holding the bare phone can be pretty hot.
Click to expand...
Click to collapse
Kernal Auditor gets the actual CPU/GPU temps , I'm not sure where apps like CPUZ or CPU Temp get their readings.
Even after running Dolphin or PPSSPP for a couple hours the CPU temp gets into the low 70's but that's as high as it goes.
These chips are safe to run up to 95 C for CPU , 100 GPU and 110 C for the battery.
Changing these settings keeps the device well within it's thermal limits.
I have had my phone set like this for months after running it many other configurations.
I just had to tell everyone about it because it beats my buddies OnePlus 3T quite a bit when it comes to gaming.

omerbagi10 said:
So there are no downsides? :silly:
Sent from my Xiaomi MIX using XDA Labs
Click to expand...
Click to collapse
Give it a try and see for yourself.
I recently upgraded to the latest epic ROM version and found my phone to be running extra slow and battery wasn't lasting as long.
Turns out the update had reverted my settings so I decided to post this thermal "fix"
I highly recommend everyone make this change really , there is a reason that OnePlus decided to underclock their OnePlus 3T and why it runs much faster than the Xiaomi Mi Mix before this fix is completed.
It's all because the thermal throttle kicks in much too early on the Mix due to the extra heat at max Mhz for the GPU and large cores.
The only way to change this and get the performance enhancements is the remove the thermal file as I posted and follow the steps to ensure good thermals.

Thanks. Done here. It got REALLY REALLY fast but so warm for now. I'll wait to see if it get colder...
Sent from my MI MIX using Tapatalk

Tried these mods right now.
Simply wonderful.
Antutu from 130.000 to over 157.000
Increased speed
Now all is very smooth
But the temperatures, incredibly, are gone down...this smartphone now is more fast and more cold.
Xiaomi/Qualcomm thermal control is so bad?
But there's a strange issue with Kernel Adiutor: I set the frequency, governor etc but, after reboot, I see these settings returning to original values. Is it normal?
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alberto8523 said:
Tried these mods right now.
Simply wonderful.
Antutu from 130.000 to over 157.000
Increased speed
Now all is very smooth
But the temperatures, incredibly, are gone down...this smartphone now is more fast and more cold.
Xiaomi/Qualcomm thermal control is so bad?
But there's a strange issue with Kernel Adiutor: I set the frequency, governor etc but, after reboot, I see these settings returning to original values. Is it normal?
Click to expand...
Click to collapse
I also have this problem.
I have set everything and the "Apply on boot" is on but everything is going back to the original values.
Sent from my Xiaomi MIX using XDA Labs

alberto8523 said:
Tried these mods right now.
Simply wonderful.
Antutu from 130.000 to over 157.000
Increased speed
Now all is very smooth
But the temperatures, incredibly, are gone down...this smartphone now is more fast and more cold.
Xiaomi/Qualcomm thermal control is so bad?
But there's a strange issue with Kernel Adiutor: I set the frequency, governor etc but, after reboot, I see these settings returning to original values. Is it normal?View attachment 4181218
Click to expand...
Click to collapse
Really? It was so warm here. Like 80 degrees celsius. Would it be cause im using RR?
Sent from my MI MIX using Tapatalk

I had the same temperatures with miui, RR and Lineage.
If I delete that file in every rom, i think I have the same results: more speed, less temperatures

I will try this settings on My MIUI ROM...
@ all...
Tips to have Kernel Adiutor to apply @ boot value (on MIUI ROM i mean)
Go to security center and manage permissions for this apps like auto startup authorized after restart i see a notification with time which say, i will aplly your value in xx seconds... and it works...
@NGP-1001
Thx for your feedback and tips, will make some test on my daily usage and send my feedback too...
Cheers

NGP-1001 said:
Even after running Dolphin or PPSSPP for a couple hours the CPU temp gets into the low 70's but that's as high as it goes.
Click to expand...
Click to collapse
Dolphin the browser? The only other Dolphin I know of is the one for GC/Wii emulation.
Low 70s is as high as mine gets too but it can get uncomfortably warm without the case. Maybe it's just when the CPU and GPU are both being pushed that the heat builds more. If I just use a CPU-only benchmark, like GeekBench, the phone only ever gets moderately warm at most.
I was really disappointed with the general stutter and performance (just in the UI, not even gaming) before I noticed your old thermal post. I can't recommend this method enough. Getting rid of the thermal.conf makes a massive difference no matter if you underclock it or push it to the max, even if you're taking a hit on battery life.
For those on the latest EPIC, the integrated Kernel Auditor is gone, so it needs installed from the Play store. Even then it won't work on boot like the old one did. You need to go into Settings > App Settings > Permissions > AutoStart and toggle it on.

Great result with performance governor

gavin19 said:
Dolphin the browser? The only other Dolphin I know of is the one for GC/Wii emulation.
Low 70s is as high as mine gets too but it can get uncomfortably warm without the case. Maybe it's just when the CPU and GPU are both being pushed that the heat builds more. If I just use a CPU-only benchmark, like GeekBench, the phone only ever gets moderately warm at most.
I was really disappointed with the general stutter and performance (just in the UI, not even gaming) before I noticed your old thermal post. I can't recommend this method enough. Getting rid of the thermal.conf makes a massive difference no matter if you underclock it or push it to the max, even if you're taking a hit on battery life.
For those on the latest EPIC, the integrated Kernel Auditor is gone, so it needs installed from the Play store. Even then it won't work on boot like the old one did. You need to go into Settings > App Settings > Permissions > AutoStart and toggle it on.
Click to expand...
Click to collapse
O, i need agree, device is much smoother then before, if u don't play, u will have a standard temp ° but i try to play Battle Bay... Got damn, baby...
Hot like a woman in video clip from old west coast sound... 84.2°... based on demande request, if u play, device come hot, other it's cold...
Will try more time to check if i can adjust temp limit to reduce speed based on temp limit...
Cheers

If anyone is still getting higher temps I would try underclocking a bit more. You will still get the speed increase even at much lower MHz. I wouldn't use the performance Governor as it's a huge battery drain.