Database Users

SetCPU safe?

Doesn't SetCPU overclocks our device? I heard constantly overclocking your device will kill it less in a year. Is this true?
Sent from HTC HD2 using XDA app.

HeavyComponent said:
Doesn't SetCPU overclocks our device? I heard constantly overclocking your device will kill it less in a year. Is this true?
Sent from HTC HD2 using XDA app.
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I used setcpu on my g1 (overclocked from 384mhz to 528mhz) for almost the whole time i had it and it didnt do any damage. The overclocking on snapdragons is more of a wait and see as no one has overclocked a snapdragon for that long but its HIGHLY unlikely that it will kill your cpu that quickly (ive been overclocking devices for years and never seen it happen). Leo users dont need to worry about overclocking with setcpu as it hasn't been enabled in the kernel we are using so the only thing setcpu is good for is underclocking and setting profiles.

So once it is enabled in our Kernel that's when we should be worried? What's the worse that can happen?
Thanks for the reply.
Sent from HTC HD2 using XDA app.

HeavyComponent said:
So once it is enabled in our Kernel that's when we should be worried? What's the worse that can happen?
Thanks for the reply.
Sent from HTC HD2 using XDA app.
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I dont think we should, people on the n1 have been doing it for months and i havent seen any posts of things going wrong and even if it is enabled in the kernel you can choose weather to use it or not via apps like set cpu

JJbdoggg said:
I dont think we should, people on the n1 have been doing it for months and i havent seen any posts of things going wrong and even if it is enabled in the kernel you can choose weather to use it or not via apps like set cpu
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It will cause lower battery life!

hazard99 said:
It will cause lower battery life!
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if you choose to use it.

JJbdoggg said:
if you choose to use it.
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I know I use it to underclock. I was just saying. I actually use it as a means of making the battery last. and also the reaction time at which the cpu scales.

JJbdoggg said:
I used setcpu on my g1 (overclocked from 384mhz to 528mhz) for almost the whole time i had it and it didnt do any damage. The overclocking on snapdragons is more of a wait and see as no one has overclocked a snapdragon for that long but its HIGHLY unlikely that it will kill your cpu that quickly (ive been overclocking devices for years and never seen it happen). Leo users dont need to worry about overclocking with setcpu as it hasn't been enabled in the kernel we are using so the only thing setcpu is good for is underclocking and setting profiles.
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So if I understand this correctly, setcpu does nothing to improve performance as far as Device speed?

dbiggss said:
So if I understand this correctly, setcpu does nothing to improve performance as far as Device speed?
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A faster cpu is generally a speed increase and at certain points the gains are null. so its usually a small mhz boost.

dbiggss said:
So if I understand this correctly, setcpu does nothing to improve performance as far as Device speed?
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Click to collapse
it does, keeping the device at 1ghz (998mhz in our case) at all times will provide better performance than scaling from 245mhz to 1ghz. read here for more info http://www.pokedev.com/setcpu/

hazard99 said:
I know I use it to underclock. I was just saying. I actually use it as a means of making the battery last. and also the reaction time at which the cpu scales.
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Click to collapse
i use it for those reasons too

N7 undervolted CPU

I have underclocked my CPU at 1GHz and undervolted it to -125mV and its working perfectly stable. Is it safe to undervolt even lower or should i be satisfied?

I see no reason why it wouldn't be safe. From what I know about overclocking is that worse case scenario is that it might make your tablet become unstable.
Sent from my Galaxy Nexus using xda app-developers app

More than likely it will reboot and reset values if something goes wrong. There's no harm in testing lower values so long as you don't set it on boot.
Tapatalk made me send this.

jshashwat93 said:
I have underclocked my CPU at 1GHz and undervolted it to -125mV and its working perfectly stable. Is it safe to undervolt even lower or should i be satisfied?
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Click to collapse
so.. your device is now running on negative voltage? does that mean its producing electricity instead of using it?

Each CPU is unique, it should detect a fault and just reset to stock voltage table
Sent from my Nexus 7 using xda app-developers app

simms22 said:
so.. your device is now running on negative voltage? does that mean its producing electricity instead of using it?
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Lol I meant -125mV taking the stock values as starting point. Not from 0. And that's how everyone using System Tuner refers to it..

jshashwat93 said:
Lol I meant -125mV taking the stock values as starting point. Not from 0. And that's how everyone using System Tuner refers to it..
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ahh.. then thats normal. if you get freezes or sod then its too much undervolting for your device. also, to much undervolting can actually lead to more battery drain.

You can lower it as much as you can the worse that can happen is that it reboots because the cpu required more electricity then it could get.
Lower it as much as you can is the best you can do

Undervolting the GT-N7000 for better Battery life

Hey there ,
so i wanted to share share my awsome Undervolting results with you
At first im running on Chasmodo's latest CM 10.1 i really appreciate his work ! I use the latest CM 10.1 Kernel.
With his rom and this voltages u find under this introduciton text i could get nearly a month with Standby time
(without doing anything , Wlan turned on , Data off) i attached a screenshot (29 Days and 5 Hours sorry for the German language)
Every day i plug my N7000 out from the Loading station its 5am on 3pm i lost 1%.
to change the Voltages i use SetCPU (full version)
1400 MHz
1200 mV (Stock: 1350mV)
1200 MHz
1100 mV (Stock: 1275mV)
1000 MHz
1000 mV (Stock: 1175mV)
800 MHz
925 mV (Stock: 1100mV)
500 MHz
900 mV (Stock 1000mV)
200 MHz
800 mV (Stock: 975mV)
So i dont know my Voltage group sorry guys , if this values are not working just go in 25mV steps lower from your stock voltage
until the CPU gets unstable or crashes than u know that u cant go lower just do this with every clocking !
I also used this voltages on XXLSC Ultimate Rom with the HydraCoreNirvana Kernel i had fantastic results too but not that good like i get with the Asylum CM 10.1.
PS: Just this Voltages wont give you very good Battery life if your Rom / Settings is/are eating your battery. If you get better results with
lower results (stable) just go ahead and post it but im sure this values are nearly the lowest stable u can get
Code:
Its [U]impossible [/U]to hard brick your device with Undervolting , you only could get a soft brick if you use (Set on Boot) and your voltages will crash your System after boot. thats easy to fix just after the phon booted up fast go into SuperSU and delete the root rights for your Undervolting tool.
Thanks for Reading and if i you liked this push the Thanks button =) !:victory:

Thanks man

I think you should say which Voltgroup (A, B or C) your note is. Because those freq are really low (I think too much low for my note, that's voltgroup B).
Do you remember which voltgroup has your note, when you installed hydracore kernel?

Better i would buy a spare battery rather than spoiling my devices performance. We arr not in 1000BC with no electricity. Sure every one can charge a spare and can switch it.
Sent from my GT-N7000 using xda app-developers app

Bad-Pixel said:
I think you should say which Voltgroup (A, B or C) your note is. Because those freq are really low (I think too much low for my note, that's voltgroup B).
Do you remember which voltgroup has your note, when you installed hydracore kernel?
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Hey there i dont remember never looked at the Voltgroup sorry so there is no other way to view my Voltgroup ?
Btw just try the voltages without autostart and u will see if your system reboots or if it works if not just go in 25mV steps higher :highfive:
qazibasit said:
Better i would buy a spare battery rather than spoiling my devices performance. We arr not in 1000BC with no electricity. Sure every one can charge a spare and can switch it.
Sent from my GT-N7000 using xda app-developers app
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Why ?
I cant get your argument my performance is the same speed while im gaming browsing same performance than before .. no impact , drops .. a spare battery ? So what about i dont want to switch my battery ? there is no need for it my battery stays alive for atleast 2-3 days when im doing something with it .

how to do if i only have rom toolbox

SkyKer93 said:
Hey there i dont remember never looked at the Voltgroup sorry so there is no other way to view my Voltgroup ?
Btw just try the voltages without autostart and u will see if your system reboots or if it works if not just go in 25mV steps higher :highfive:
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It's a feature of the hydracore kernel only I think, because its read a particular value (something about mainboard and/or cpu) and the kernel automatically apply dedicated undevolt values. You could see it in system information, where hydracore kernel is detected. Without it, I think you can't do anything :/
Anyway, sincerely I remember some time ago I tried to lower my already undervolted cpu voltages, and I got freezes. I will try to go lower a bit, hoping it will works. A very important thing, is not only the lower battery drain, but also the lower cpu temps.
ahhl said:
how to do if i only have rom toolbox
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I bought rom toolbox full sometime ago, when there was sales. If I remember correctly, there is a section relative to the cpu control, but I don't remember if it was undervolting capable also. You should start to search it from there (I'm sorry, I don't have the app installed anymore, so I can't help you properly... In case, use voltage control app)
Sent from my GT-N7000 using xda premium

I dont think it has UV feature. Just CPU freq control

nokiamodeln91 said:
I dont think it has UV feature. Just CPU freq control
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Click to collapse
Yes, you're right, I just checked (installing my bought pro version) and it hasn't the uv features. Anyway, as I suggested, he can use voltage control (even if I don't know if his kernel support the uv/oc)
Sent from my GT-N7000 using xda premium

nokiamodeln91 said:
I dont think it has UV feature. Just CPU freq control
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Click to collapse
Bad-Pixel said:
Yes, you're right, I just checked (installing my bought pro version) and it hasn't the uv features. Anyway, as I suggested, he can use voltage control (even if I don't know if his kernel support the uv/oc)
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What do you mean by Rom Toolbox doesn't have voltage control?
Tap kernel tweaks, then any frequency and you'll find a voltage slider in there.

chasmodo said:
What do you mean by Rom Toolbox doesn't have voltage control?
Tap kernel tweaks, then any frequency and you'll find a voltage slider in there.
Click to expand...
Click to collapse
Maybe it depend from the kernel I'm using now (philz 3.99 on BurtRom tw rom) but I can't able to do what you said. I checked on rom toolbox pro again, and I didn't see any uv feature. Just goverors/kernel tweaks (like vm or fs features) or profiles management... Nothing else.
Anyway I'm using tegrak ultimate app to Undervolt my cpu and gpu, and it works perfectly, so I don't miss so much that feature.
Sent from my GT-N7000 using xda premium

I don't know - I am not sure if Undervolting could hard-brick or damage the hardware but back then running GB roms I had undervolted FM Kernel and there was trrrr trrr trrr like sound from my Note.
Be careful.

I have to do a custom rom just to see if its all true....otherwise am not interested at all in undervolting my phone. Hope its true...
Sent from my GT-N7000 using xda app-developers app

Boy124 said:
I don't know - I am not sure if Undervolting could hard-brick or damage the hardware but back then running GB roms I had undervolted FM Kernel and there was trrrr trrr trrr like sound from my Note.
Be careful.
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Click to collapse
never had any problems and just logical cpus could brick if you give them too mutch voltage , if you give them less voltage the system only can crash your sound could have been beacuse it crashed so really u cant hard brick your device with undervolting ... maybe a softbrick if your unstable voltage settings are on autostart.
qazibasit said:
I have to do a custom rom just to see if its all true....otherwise am not interested at all in undervolting my phone. Hope its true...
Sent from my GT-N7000 using xda app-developers app
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Click to collapse
no need for a custom rom mate , you just need a custom kernel wich is able to uv for example HydraCoreNirvana
Bad-Pixel said:
Maybe it depend from the kernel I'm using now (philz 3.99 on BurtRom tw rom) but I can't able to do what you said. I checked on rom toolbox pro again, and I didn't see any uv feature. Just goverors/kernel tweaks (like vm or fs features) or profiles management... Nothing else.
Anyway I'm using tegrak ultimate app to Undervolt my cpu and gpu, and it works perfectly, so I don't miss so much that feature.
Sent from my GT-N7000 using xda premium
Click to expand...
Click to collapse
Hey there , you cant uv with Philz kernel just read his thread check his FAQ there hes writing that hes not supporting
oc/uv its just a repacked stock kernel
use HydraCoreNirvana but when you download the kernel check that its the OC version if not than you cant change your voltage like with Philz kernel.
:highfive:

SkyKer93 said:
Hey there , you cant uv with Philz kernel just read his thread check his FAQ there hes writing that hes not supporting
oc/uv its just a repacked stock kernel
use HydraCoreNirvana but when you download the kernel check that its the OC version if not than you cant change your voltage like with Philz kernel.
:highfive:
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Click to collapse
You can you can
Just use tegrak ultimate Overclock app. I bought it because I think it's the only who give you the possibility to Undervolt the gpu also. Initially, philz kernel wasn't supported, but now it is. I undervolted my cpu setting the values that I had using the hydracore kernel oc. And today I lowered them of another - 25mV also. Everything works nicely until now
Sent from my GT-N7000 using xda premium

qazibasit said:
Better i would buy a spare battery rather than spoiling my devices performance. We arr not in 1000BC with no electricity. Sure every one can charge a spare and can switch it.
Sent from my GT-N7000 using xda app-developers app
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Click to collapse
Nice attitude you are showing there. Oh, there is plenty of power, let's waste.it! Really, that kind off attitude is definitely going to make the world a better place
What's more why do you think undervolting does influence the performance? It only influences the power consumtion and if you go too far it does render the phone unstable. But it certainly does not in-, or decrease the cpu's performance.
Sent from my revived Galaxy Note
---------- Post added at 01:50 AM ---------- Previous post was at 01:45 AM ----------
Bad-Pixel said:
You can you can
Just use tegrak ultimate Overclock app. I bought it because I think it's the only who give you the possibility to Undervolt the gpu also. Initially, philz kernel wasn't supported, but now it is. I undervolted my cpu setting the values that I had using the hydracore kernel oc. And today I lowered them of another - 25mV also. Everything works nicely until now
Sent from my GT-N7000 using xda premium
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Yep tegrak definitely does the trick with PhilZ kernels. I have been using it for at least 8 months now and my phone is undervolted too. Only the highest cpu state is overvolted because I overclocked it to 1552 MHz instead of 1400.
Sent from my revived Galaxy Note

I would love this kernel under ubls4 if it has a proper exfat support. Until this is not fixed like philz kernel, I can not test or try
Sent from my GT-N7000 using xda premium

altae said:
Nice attitude you are showing there. Oh, there is plenty of power, let's waste.it! Really, that kind off attitude is definitely going to make the world a better place
What's more why do you think undervolting does influence the performance? It only influences the power consumtion and if you go too far it does render the phone unstable. But it certainly does not in-, or decrease the cpu's performance.
Sent from my revived Galaxy Note
---------- Post added at 01:50 AM ---------- Previous post was at 01:45 AM ----------
Yep tegrak definitely does the trick with PhilZ kernels. I have been using it for at least 8 months now and my phone is undervolted too. Only the highest cpu state is overvolted because I overclocked it to 1552 MHz instead of 1400.
Sent from my revived Galaxy Note
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Please explain why you overvolted AND overclocked the highest cpu state. Doesn't this shorten your batteries performance?

Did you changed cpu governor or something else (like screen off profile to reduce CPU) to achieve 1% battery loss at 3pm?
And was that with mobile data on?

jcbobeda said:
Please explain why you overvolted AND overclocked the highest cpu state. Doesn't this shorten your batteries performance?
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Click to collapse
I overcloked the highest cpu state from 1400 Mhz to 1552 Mhz because I want more performance. And because my phone became unstable with the 1552 Mhz and the standard voltage. So now my phone saves energy when the lower cpu states are active and it has a bit of extra power at the expense of battery life when it needs the most processing power. All in all that gives me better battery life than with stock settings and a snappier device when needed. For me this is the ideal solution.
Sent from my revived Galaxy Note

How safe is overclocking?

I am experiencing lag on real racing 3, on high graphics. If I overclock to say 2ghz on cpu, will the tablet be stable enough? Should I undervolt ( and does it actually make any difference on temps)? I want to overclock but not at the cost of huge battery drain, can some1 recommend me a good kernel and some stable oc steps?
Sent from my Nexus 10 using Tapatalk HD

lvnatic said:
I am experiencing lag on real racing 3, on high graphics. If I overclock to say 2ghz on cpu, will the tablet be stable enough? Should I undervolt ( and does it actually make any difference on temps)? I want to overclock but not at the cost of huge battery drain, can some1 recommend me a good kernel and some stable oc steps?
Sent from my Nexus 10 using Tapatalk HD
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Are you running a custom ROM and kernel? I play RR3 daily and have NO lag. AOKP PUB ROM with ktmanta kernel, at 1.7mhz CPU and GPU OC to 720. Runs great.
Most OC is safe, issues are really with battery and overheating. I've run for long periods at 1900 just fine.

So there's no way the tablet will melt down because of the heat? Does warranty cover that? Assuming they don't know it was overclocked, which they couldn't because the device would be dead, right? I guess they don't bother to repair it and see if it was rooted.
LE: btw did you manage to safely undervolt? Even a -5 gives me reboots on most freqs.

Any time I try to use the app from the store to set the graphics mode it causes problems. Running RR3 without it works fine.

lvnatic said:
So there's no way the tablet will melt down because of the heat? Does warranty cover that? Assuming they don't know it was overclocked, which they couldn't because the device would be dead, right? I guess they don't bother to repair it and see if it was rooted.
LE: btw did you manage to safely undervolt? Even a -5 gives me reboots on most freqs.
Click to expand...
Click to collapse
Take a look at the KTmanta thread. KTmanta is a great option for what you are after, he notes and codes distinctions between clocking and thermal protection, plus unless you lock the settings, they will reset at reboot!
If you tell Google you messed it up from some sort of tinkering, no - they won't help you.

lvnatic said:
So there's no way the tablet will melt down because of the heat? Does warranty cover that? Assuming they don't know it was overclocked, which they couldn't because the device would be dead, right? I guess they don't bother to repair it and see if it was rooted.
LE: btw did you manage to safely undervolt? Even a -5 gives me reboots on most freqs.
Click to expand...
Click to collapse
I am assuming you must be using the KTmanta kernel right? I thought it was the only kernel right now that allows for user control undervolting. Trinity has a static -50mv value set on all frequencies by default. You should be able to undervolt just about everything. Getting lockups at -5mv lets me think there is something you are not doing correctly
EDIT: threw the quote in so its less confusing

EniGmA1987 said:
I am assuming you must be using the KTmanta kernel right? I thought it was the only kernel right now that allows for user control undervolting. Trinity has a static -50mv value set on all frequencies by default. You should be able to undervolt just about everything. Getting lockups at -5mv lets me think there is something you are not doing correctly
Click to expand...
Click to collapse
Yes, the kernel
Edit: oops thought you were asking me, I see now I was confused.

CPU Type

Hello!
My "Cpu Type" is Slow and I want to undervolt it (to get better battery and less heat).
What are the best undervolting for keeping the device stable and with better battery and less heat?
Thanks!

Every chip is different, regardless of bin type. You'll have to experiment and see for yourself. Drop it a notch and use your phone to test for stability. If it seems stable, drop it one more. Keep going until you find the place that causes freezes. Then bump it back up and use the "set on boot" option all performance apps have.

estallings15 said:
Every chip is different, regardless of bin type. You'll have to experiment and see for yourself. Drop it a notch and use your phone to test for stability. If it seems stable, drop it one more. Keep going until you find the place that causes freezes. Then bump it back up and use the "set on boot" option all performance apps have.
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Click to collapse
I undervolted to 50, will it do what I want or should I undervolt more?
I heard that if I undervolt too much the device won't turn on, how can I avoid that?
Thank for the answer!

Wassupdog said:
I undervolted to 50, will it do what I want or should I undervolt more?
I heard that if I undervolt too much the device won't turn on, how can I avoid that?
Thank for the answer!
Click to expand...
Click to collapse
Don't set the voltage settings to stick on boot until you find your lowest stable voltage.
Sent from my Nexus 4 using xda app-developers app

Wassupdog said:
I undervolted to 50, will it do what I want or should I undervolt more?
I heard that if I undervolt too much the device won't turn on, how can I avoid that?
Thank for the answer!
Click to expand...
Click to collapse
I thought I explained this already, but I'll try it a different way. I can't answer the question because your chip is different from mine, along with everyone else's. The voltage will not be set until after the boot process is complete, which is why I told you to determine the lowest stable voltage and THEN use the set on boot option. That way you don't get an immediate freeze on every boot. Make sense?
Again, you still need to determine what your optimal voltage change is. We cannot tell you that.
Also, undervolting changes your battery life VERY little. It will likely not even be noticeable. Where you'll see the real benefit is in the area of heat. Even the 50 you've already done should make a noticeable change. On a device with a lot lower throttling point than most, this is a good thing.

Harry GT-S5830 said:
Don't set the voltage settings to stick on boot until you find your lowest stable voltage.
Sent from my Nexus 4 using xda app-developers app
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Click to collapse
estallings15 said:
I thought I explained this already, but I'll try it a different way. I can't answer the question because your chip is different from mine, along with everyone else's. The voltage will not be set until after the boot process is complete, which is why I told you to determine the lowest stable voltage and THEN use the set on boot option. That way you don't get an immediate freeze on every boot. Make sense?
Again, you still need to determine what your optimal voltage change is. We cannot tell you that.
Also, undervolting changes your battery life VERY little. It will likely not even be noticeable. Where you'll see the real benefit is in the area of heat. Even the 50 you've already done should make a noticeable change. On a device with a lot lower throttling point than most, this is a good thing.
Click to expand...
Click to collapse
Thank you both!
What can I do to increase battery life?

Wassupdog said:
Thank you both!
What can I do to increase battery life?
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Click to collapse
Play around with different kernels. They will all give you different performance vs. battery life. Use the one that suits you. Personally, I go back and forth between hells core and semaphore.
You might also check out greenify. It will hibernate apps that you tell it to instead of letting them suck up resources in the background.

estallings15 said:
Play around with different kernels. They will all give you different performance vs. battery life. Use the one that suits you. Personally, I go back and forth between hells core and semaphore.
You might also check out greenify. It will hibernate apps that you tell it to instead of letting them suck up resources in the background.
Click to expand...
Click to collapse
I have no problem to move between kernels but just if they have Franco's colors tuning option.
The Nexus screen looks wayyy better with it.

Wassupdog said:
I have no problem to move between kernels but just if they have Franco's colors tuning option.
The Nexus screen looks wayyy better with it.
Click to expand...
Click to collapse
This should help with semaphore. It uses Franco's values, but in a different order.
http://forum.xda-developers.com/showpost.php?p=43828267&postcount=2035

estallings15 said:
This should help with semaphore. It uses Franco's values, but in a different order.
http://forum.xda-developers.com/showpost.php?p=43828267&postcount=2035
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Semaphore is good for battery life?
And I ran antutu with -75 UV and it is very not stable.
I can stay at 50 .

Wassupdog said:
Semaphore is good for battery life?
And I ran antutu with -75 UV and it is very not stable.
I can stay at 50 .
Click to expand...
Click to collapse
It is for me. That's why I recommended it.
You might take note of those voltages that work for you. I can't remember, but Semaphore might have lower values right out of the gate.
Now stop asking questions and start trying things out If you're scared, make a backup. No matter what you do with the voltage settings, you can always restore the backup.
Happy flashing!

estallings15 said:
It is for me. That's why I recommended it.
You might take note of those voltages that work for you. I can't remember, but Semaphore might have lower values right out of the gate.
Now stop asking questions and start trying things out If you're scared, make a backup. No matter what you do with the voltage settings, you can always restore the backup.
Happy flashing!
Click to expand...
Click to collapse
Thank you very much !