Has anyone experienced performance enhancement with Clock Rate of 1500 in XOOM?
Also, are there any side effects on the life of CPU if this clock rate is used permanently?
Cheers.
Yes, I get significant increase at 1.5. I haven't noticed any substantial decreases in battery life, and as long as it isn't getting too hot than you shouldn't have to worry about the CPU dying much sooner than normal.
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d3athsd00r said:
Yes, I get significant increase at 1.5. I haven't noticed any substantial decreases in battery life, and as long as it isn't getting too hot than you shouldn't have to worry about the CPU dying much sooner than normal.
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Thanks, I will try using 1500.
Obviously running the cpu at 50% faster is going to provide and improvement in the overall speed. The heat is negligible with the Xooms big metal back. Battery may be affected but I have never used stock speed.
Related
What is the difference between Adrynalyn's 12/30 kernal and JT's 12/30 kernal? I know Adrynalyn's are based off JT's, but I'm curious what the difference actually is. I'm guessing voltage and clock speed?
I'm curious too......
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the lower voltage
iwasaperson said:
the lower voltage
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this means better battery life correct?
Which one has the lower voltage?
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Better question is which one offers better battery performance.
RacerXFD said:
Better question is which one offers better battery performance.
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Adryn's ....
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RacerXFD said:
Better question is which one offers better battery performance.
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By definition the lower voltage will consume less power, and while I'm trained in electrical engineering and not chemistry, I'm pretty sure that lower power will result in longer battery life. If you're trying to say something about performance, as long as the clock speeds are the same performance won't be affected. Now, at a lower level the higher voltage will cause the transistors to switch faster, but your CPU is clocked to synchronize everything and the clock frequency is slower than the slowest part of your CPU so it doesn't matter if the circuits are switching faster, you'll still do the same amount of work at the same clock speed. Barring glitches of course, but usually chips are designed with tolerances so undervolting a little shouldn't be a problem, because supply voltages can vary a bit anyway.
I didn't know adryn had anything over 1217... link to 1230?
kyfredrickson said:
I didn't know adryn had anything over 1217... link to 1230?
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http://forum.xda-developers.com/showthread.php?t=894126
(Q) can anyone tell me the consequences of overclocking too high
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TripleNP said:
(Q) can anyone tell me the consequences of overclocking too high
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Your phone will reboot, it burns through your battery life quicker and overall can be hard on the hardware for your phone over an extended period of time....same as a computer
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Cool that's what I thought...I recently installed the GB them and I thought that had something to do with it but them remembered that I had boosted the clock sod....hasn't booted on me since I dropped it back down a lil.
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I find that often the highest overclock kernel's usually don't work for most people. Pick one a few notches down and you will most likely enjoy the benefits of overclocking without any issues.
With ultra low voltage kernels, it is possible to overclock and still use less battery since the lower voltage requires a lower current.
http://www.xda-developers.com/andro...ry-study-brings-about-surprising-conclusions/
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hmm very interesting
If you read through the whole thread you'll see that much of his research is still inconclusive. For instance, his assertion that undervolting does nothing for battery life.
k_nivesout said:
If you read through the whole thread you'll see that much of his research is still inconclusive. For instance, his assertion that undervolting does nothing for battery life.
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Hence the "probably" in title.. But his work does show that undervolting does not give a gain large enough to justify pushing uv to its limits, and for people to pull their hair out stressing over weather they should uv to -100mv art the 100mhz step or not. It's just not worth it. People should be more concerned about stability. And of you want REAL gains, put a black wallpaper on your homescreen and find all the black themed apps you can. As this is a much bigger gain for battery.
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neh4pres said:
Hence the "probably" in title.. But his work does show that undervolting does not give a gain large enough to justify pushing uv to its limits, and for people to pull their hair out stressing over weather they should uv to -100mv art the 100mhz step or not. It's just not worth it. People should be more concerned about stability. And of you want REAL gains, put a black wallpaper on your homescreen and find all the black themed apps you can. As this is a much bigger gain for battery.
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Agree 100% with this!
Or get one of these xD
http://www.thinkgeek.com/interests/dads/ceca/
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I have noticed that I get much better battery life on the ICS Roms after I run down the battery and fully charge a couple of times.
I am also using V6 Supercharger. I can't tell if this is helping or not but it seems to extend my battery life.
bedalus said:
Coming soon, a more thorough test of deep idle and undervolting, thanks for the ideas from OCedHrt. Please ignore points 1 and 2 until the results are completed. [Q] when's that? [A] soon enough [Q] that's not soon enough? [A] Is that a rhetorical question? [Q] Is this? [A] Yes.
Summary of Results
1 - PENDING FEEDBACK FROM OTHERS--- The main shock was that Deep Idle did not work as intended. There are three forms of Deep Idle: the CPU Idle backport from kernel 3.2, Eugene's Deep Idle, and Ezekeel's. All three were tested, and no battery saving was measured. I also tested Deep Idle in Carbon (Jonathon Grigg's ICS themed Oxygen 2.3.1, android version 2.3.7, gingerbread) using Ezekeel's last kernel for gingerbread, and that showed no battery saving either. With the option for 'Screen Off Maximum Frequency' set to ON, the battery drain was higher (both in ICS and GB). --- PENDING FEEDBACK FROM OTHERS
2 - UNDERVOLTING---Everyone can safely ignore my earlier conclusions about it having no impact, because it looks like once you fix the CPU to a certain frequency, changing the voltage doesn't work. For some reason, it needs to move to another frequency, then back to the frequency you changed the voltage for. I will retest UV with this in mind, and should be able to produce accurate results for the battery savings offered. This is my next priority.
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Taken from the 2nd post of the thread linked to.
Hm.interesting
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I think undervolting helps.
At least I thought so
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Guys, check out the new kernel here:
http://forum.xda-developers.com/showthread.php?t=1870259
It is written for the N8000 but I have run it on my 8013 without issues. The prior version of this caused flaky wifi but so far the newer version has been stable for me. If you do get a wifi crash, just turn wifi off then back on and it will reconnect easily. Up to you whether than small inconvenience is worth it for the extra speed.
Was able to use SetCPU to OC my SGN10.1 to 1704 at Performance and run some tests. Nailed a 6308 quadrant first try - wow!!! I have my SDcard OC'd to 4096 as well. Remember to always uncheck "Set at Boot" in SetCPU when testing out new speeds. You don't want to get stuck in a bootloop if you push things too far.
** One point. I found that OC to 1600 crashed my machine. Don't know why (dev bumped voltage to 1425 mv at 1704 - that's probably why), but for me anyway, 1704 seems stable for now.
I take no credit for this work (this is brieuwers doing) - simply passing the word along and letting 8013 owners no that, at least so far it has not melted my rig. Please do not thank me. Just passing along the word.
P.S., I got one bootloop after flashing with ODIN but then it booted fine.
** As always, if you brick your rig it's on you.
UPDATE - This is about 15% faster now and it feels it.
mitchellvii said:
UPDATE - This is about 15% faster now and it feels it.
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Does that mean it's 15% warmer?
TonyBigs said:
Does that mean it's 15% warmer?
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Honestly haven't noticed any heat increase.
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Battery life reduction?
TheWerewolf said:
Battery life reduction?
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Not that I've noticed but I typically use my tablet in my office where it is plugged in so hard to tell.
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there will be a battery life decrease when using the tablet constantly at 100% cpu usage. bumping the voltage guarantees that. as for how much that is i can't tell you but under my normal use my tablet doesn't run full throttle all the time so the extra drain is negligible.
madsquabbles said:
there will be a battery life decrease when using the tablet constantly at 100% cpu usage. bumping the voltage guarantees that. as for how much that is i can't tell you but under my normal use my tablet doesn't run full throttle all the time so the extra drain is negligible.
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What one has to wonder is does the very act of the cpu constantly throttling up and down and measuring what speed is best actually burn more fuel than just remaining at a high constant overclock? Think of it as city stop and go driving vs cruising on the highway.
If we are talking hours of difference then you have a point. But if we are just talking an extra 20 to 30 minutes of battery I would rather just have the speed. YMMV.
mitchellvii said:
What one has to wonder is does the very act of the cpu constantly throttling up and down and measuring what speed is best actually burn more fuel than just remaining at a high constant overclock? Think of it as city stop and go driving vs cruising on the highway.
If we are talking hours of difference then you have a point. But if we are just talking an extra 20 to 30 minutes of battery I would rather just have the speed. YMMV.
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Well yeah,.going.faster means finishing quicker but generally you can expect higher levels of inefficiency at higher rigor... my somewhat educated opinion, without tossing around numbers, is that he effect on the battery life should be minimal.
Theres also the fact that with a 10 inch tablet, the screen takes up a clear majority of the current.. the processor, even while at 100% still pales in comparison.. and the processor is.not often at 100%.. you dont really flash the screen.on and off, you usually have it on for a block of time.. processor only really works during tasks and then idles.
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Hello!
I heard about the term "UnderVolting" and I heard it would give me better battery life.
I want to do it but I have few questions before.
1. Is undervolting affects the CPU , GPU or Battery?
2. Can It damage the device?
3. Can it decrease the device performance?
Thanks!
Wassupdog said:
Hello!
I heard about the term "UnderVolting" and I heard it would give me better battery life.
I want to do it but I have few questions before.
1. Is undervolting affects the CPU , GPU or Battery?
2. Can It damage the device?
3. Can it decrease the device performance?
Thanks!
Click to expand...
Click to collapse
1. It effects the cpu. When you undervolt you are reducing the amount of power that is supplied to the cpu depending on what speed the cpu is running at.
2. It is unlikely to damage the device physically but if you undervolt too far the cpu can start failing actions resulting in corruption, but the most common symptom is that it will reboot itself if you go too low.
3. Undervolting can reduce performance but going down -100 mv across the board is usually stable for most.
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Alex240188 said:
1. It effects the cpu. When you undervolt you are reducing the amount of power that is supplied to the cpu depending on what speed the cpu is running at.
2. It is unlikely to damage the device physically but if you undervolt too far the cpu can start failing actions resulting in corruption, but the most common symptom is that it will reboot itself if you go too low.
3. Undervolting can reduce performance but going down -100 mv across the board is usually stable for most.
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Thanks!
Is it recommended to undervolt?
I just want a better battery and around the same performance as it now.
You are confusing undervolt with underclock. UC is a proven way to increase battery, but it directly makes the CPU run slower. UV will make the CPU/GPU/RAM receive less milivolts, and it will only increase battery, and not decrease performance. The thing with UV is that if the CPU at any given time does not get enough power, it can't perform a given task, and your phone will reboot.
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In a nutshell UV will not destroy your phone and is it recommended? If you are in xda then you know the risks or at least should read up on the risks. I would say 90% of the custom kernels are undervolted out the box and yes its a great help. I have been UV, UC and sometimes even OC for years now with no negative effects. Give it a shot and if you are worried start slow like -25.
Try mathkids kernel(JSS roms only) which is undervolted -100 and if you read the thread its never been an issue for anyone. I have heard that UV may cause some issues with Maps locking fast
Dr.Molestratus said:
You are confusing undervolt with underclock. UC is a proven way to increase battery, but it directly makes the CPU run slower. UV will make the CPU/GPU/RAM receive less milivolts, and it will only increase battery, and not decrease performance. The thing with UV is that if the CPU at any given time does not get enough power, it can't perform a given task, and your phone will reboot.
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I'm not Confusing undervolt with underclock.
Undervolting can and does reduce performance if you go too far. (Not far enough to cause reboots)
Underclocking is not a proven way to increase battery, in fact it's quite controversial.
It's called race to idle.
Pretty much all processors have great power savings at idle speeds.
By lowering the clock speed common tasks and background processes take longer to perform. Thus keeping the cpu at a higher clock rate (using more mv) for longer and overall using more battery than what it would have done at a higher speed.
From my own tests -150 mv undervolt resulted in slower and sometimes even laggy performance. -100 is great
Underclocking to 1ghz shortened my average daily battery life by nearly 2 hrs compared to running at stock 1.5
Say what you like about stats but these are the results I found from actual usage
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UV will reduce how hot your phone gets.. and if your phone gets too hot thermal throttling will reduce the cpu speed.. and thus if u UV it will reduce thermal throttling and will increase performance..
Thanks to everyone !