[Q] Thermal throttling ridiculously low? - Galaxy S III Q&A, Help & Troubleshooting

Hi, I've got an annoying problem...
As far as i know the first thermal threshold for kicking down the CPU freq to 800MHz is set to somewhere around 80oC in SGS3. But in my case it kicks in after achieving just 51-54oC which makes some games unplayable after 5 mins
I've read somewhere that the battery temperature (45oC or so) is also considered when throttling down the CPU frequency, but my battery hits just 41oC when it happens...
Could it be a faulty temperature sensor(s) or just faulty almost 2 years old battery? I have no more clues, could anybody help?
Thanks a lot!

flither said:
Hi, I've got an annoying problem...
As far as i know the first thermal threshold for kicking down the CPU freq to 800MHz is set to somewhere around 80oC in SGS3. But in my case it kicks in after achieving just 51-54oC which makes some games unplayable after 5 mins
I've read somewhere that the battery temperature (45oC or so) is also considered when throttling down the CPU frequency, but my battery hits just 41oC when it happens...
Could it be a faulty temperature sensor(s) or just faulty almost 2 years old battery? I have no more clues, could anybody help?
Thanks a lot!
Click to expand...
Click to collapse
That's tricky... Afaik you CAN change some system files to avoid throttling but I don't believe that that would be healthy... Your temperature sensors could also be faulty... I don't know
Sent from my toaster

yeah, but is it possible that it's throttling down on such normal temperatures? Or maybe there's another safety mechanism involved (dunno, maybe GPU temp sensor)? But my GPU runs on stock freqs and voltage...also it doesn,t matter if i'm undervolted on CPU or not, still the same

flither said:
yeah, but is it possible that it's throttling down on such normal temperatures? Or maybe there's another safety mechanism involved (dunno, maybe GPU temp sensor)? But my GPU runs on stock freqs and voltage...also it doesn,t matter if i'm undervolted on CPU or not, still the same
Click to expand...
Click to collapse
I don't actually know... I've never faced throttling problems so i don't know what else can cause this.. Perhaps there is something else involved...
Sent from my toaster

SOLVED
After a really deep search I found out that Sammy based roms have a CPU throttle after battery reaches 41oC...now to change it

Related

Help me to overclock x10

Hello..anyone can teach me how to overclock xperia x10
Bootloader is not unlocked. It's impossible at the moment.
Sent from my X10i using XDA App
satAxOnic said:
Hello..anyone can teach me how to overclock xperia x10
Click to expand...
Click to collapse
First, you crack the bootloader.
When you've done that, I'm guessing you allready figured out how to OC the CPU
Sent from my FreeX10i beta2.
satAxOnic said:
Hello..anyone can teach me how to overclock xperia x10
Click to expand...
Click to collapse
For now just use the overclock widget. set top two settings as high as you want up to 998 click on off screen frequency. set between 246 and next number you choose. set at boot save. define settings at what mhz you like and experiment. do not run on screen and off screen freq at max. i have had my battery sweating and even plugged in all day and not gained a single % of charge. until boot loader is cracked.... this is all you can do.
xperiax10a
2.2b2
Bummmod
gapps1901
quadrant 1800
linpack 40.XX
Although it's impossible today because of bootloader, note it's always dangerous and not great to overclock embedded cpus.
You can't overclock a lot, as you have a battery (X10 works about 5-10 hours with full speed - 998MHz), and the CPU only has passive elements to cool. Overclock can damage your CPU and your motherboard, stress all elements and low your battery life (battery charge and cycle of charge). (Even there's a self shutdown when too hot)
You can get an idea of overclock on Nexus forum, as we have the same CPU (Snapdragon 8250) - I saw overclock up to 1300 MHz, but it's really not looking safe to me
Thanx everyone..
Perceval from Hyrule said:
Although it's impossible today because of bootloader, note it's always dangerous and not great to overclock embedded cpus.
You can't overclock a lot, as you have a battery (X10 works about 5-10 hours with full speed - 998MHz), and the CPU only has passive elements to cool. Overclock can damage your CPU and your motherboard, stress all elements and low your battery life (battery charge and cycle of charge). (Even there's a self shutdown when too hot)
You can get an idea of overclock on Nexus forum, as we have the same CPU (Snapdragon 8250) - I saw overclock up to 1300 MHz, but it's really not looking safe to me
Click to expand...
Click to collapse
Depends also on the voltage (as long as your voltage isn't increasing as you overclock, it isn't really that harmful as long as you watch the heat), and what you have your underclock speed set to with screen off (as this can in some sense reverse some of the possible "damage")...
I had my htc hero overclocked to 710 with the screen on, and underclocked 176 with the screen off and it ran a lot better.
I digress, I see no purpose in doing so when you already have a 1ghz processor that is super fast. I only really see a point in overclocking if the possible benefit is greater than the possible harm, and in this circumstance, I really don't think you would see that much benefit.
fiscidtox said:
Depends also on the voltage (as long as your voltage isn't increasing as you overclock, it isn't really that harmful as long as you watch the heat), and what you have your underclock speed set to with screen off (as this can in some sense reverse some of the possible "damage")...
I had my htc hero overclocked to 710 with the screen on, and underclocked 176 with the screen off and it ran a lot better.
I digress, I see no purpose in doing so when you already have a 1ghz processor that is super fast. I only really see a point in overclocking if the possible benefit is greater than the possible harm, and in this circumstance, I really don't think you would see that much benefit.
Click to expand...
Click to collapse
I have seen considearable difference when maxed out. however the dangers are high of overheat. ive done it once and onetime only. kept on and off screen at 998 and hat it plugged in all day with out a single gain of battery. it was like on life support and was hot enough the phone was sweating even when sitting next to a fan blowing on it constantly.:-( since then i have made adjustments to run between 700 and 998mhz on screen and min 246 and 400mhz when screen off.
if looking for better performance without the overclock and good drain of battery, download and install sysctl from market and follow settings below.
min free kb: 900000
dirty ratio:500000
dirty background:200000
vfs cache pressure:10
Oom allocating: checked
On SetCPU there is Set on boot- to be checked or not?
Sent from my X10i using Tapatalk
it should be checked
OC can damage yo device. Id say its better to hv a lil slower device than a dead device
Sent from my X10x using XDA App
live4speed said:
OC can damage yo device. Id say its better to hv a lil slower device than a dead device
Sent from my X10x using XDA App
Click to expand...
Click to collapse
Not in all instances. Depends on the quality of the chip. Lot of chips are capable of handling higher speeds and temps but are set lower quality assurance.
For instance, I've got a NookColor that has base CPU set at 800MHz and is now overclockable to 1.2GHz
We'll have to do stress tests on some to see what they're capable of.
andrewddickey said:
Not in all instances. Depends on the quality of the chip. Lot of chips are capable of handling higher speeds and temps but are set lower quality assurance.
For instance, I've got a NookColor that has base CPU set at 800MHz and is now overclockable to 1.2GHz
We'll have to do stress tests on some to see what they're capable of.
Click to expand...
Click to collapse
Agreed.
My Motorola Defy has a Omap3630 that comes at 800MHz,stock but can be easily overclocked to 1.3GHz without a sweat.
Just depends on the chip's capacity of "Stress".
Respect

Phone too hot to touch after 5 minutes of gaming.

Hi all, running lite'ning rom 1.4 and just played order and chaos for 5 minutes and the phone became too hot to touch! Surely this shouldn't be right, i mean what the hell! Anyone else have this?
paulo91 said:
Hi all, running lite'ning rom 1.4 and just played order and chaos for 5 minutes and the phone became too hot to touch! Surely this shouldn't be right, i mean what the hell! Anyone else have this?
Click to expand...
Click to collapse
Actually yes,many people have this.It's the CPU overheating.Beware,it doesn't get hotter than other CPUs on the market,but heat disipation on the GS2 is minimal as the phone is so thin.
The only thing you can try is lowering the CPU clock to 1000Mhz or even 800Mhz when gaming.You can even boost your GPU to 400Mhz up from 267Mhz and don't overheat then.There will also be no performance hit as games run mainly on the GPU and two cores running at 1GHz are more than enough to handle the background.
I havent noticed the phone getting super hot as some people have noted. I do notice that it does get a lot hotter if its plugged in and charging while playing a game. Are you by chance charging while playing? If so, I'd try and play while not charging to see if it gets really hot still.
No this isnt while charging and it literally was 5 minutes of playing! How do I change the cpu and gpu speeds safetly?
it also depends on the game itself, many of them are just poorly programmed
to your question: setcpu is the app.
tolis626 said:
Actually yes,many people have this.It's the CPU overheating.Beware,it doesn't get hotter than other CPUs on the market,but heat disipation on the GS2 is minimal as the phone is so thin.
The only thing you can try is lowering the CPU clock to 1000Mhz or even 800Mhz when gaming.You can even boost your GPU to 400Mhz up from 267Mhz and don't overheat then.There will also be no performance hit as games run mainly on the GPU and two cores running at 1GHz are more than enough to handle the background.
Click to expand...
Click to collapse
I dont have an SGS2 yet but your statement has a total flaw, if games mainly use the GPU then there should be zero need to underclock the CPU.
EarlZ said:
I dont have an SGS2 yet but your statement has a total flaw, if games mainly use the GPU then there should be zero need to underclock the CPU.
Click to expand...
Click to collapse
Have you ever seen anything running on the GPU ONLY?What I mean is that the GPU processes the graphics,which are important when playing a game.The CPU takes on other tasks,like opponent's AI(artificial intelligence),background and foreground code running and many other things.Sound maybe?All these things keep the CPU running at 100% for no reason.Lower the clock and voila!
Check first before you try to say I'm wrong next time.I don't usually say bullsh!t with such things.

[REQ] Standalone fix for high CPU freq with screen on

As I understand solution for "998 MHz with screen on" bug is found: http://forum.xda-developers.com/showthread.php?t=1225411&page=17#post16944722
We need to replace only one governor.
I don't want to play with different ROMs and kernels and I'm looking for simplest solution.
Is it possible to compile it as a module ("ondemand_mod" for ex.) and add it to stock ROM?
Or any other (simple) way?
Wrong section ...
Sent from my X10i using Tapatalk
Why wrong Section, this is Development to get the CPU Governor working correctly
Wolfbreak said:
Why wrong Section, this is Development to get the CPU Governor working correctly
Click to expand...
Click to collapse
Exactly, this is the right section for such request.
However, I can't help but wonder: is this really a "problem"?
No offence to anyone, but I find that the phone is very snappy
when on max frequency... The big problem for me, would be if it
didn't go into Deep Sleep immediately after turning the screen off
and stayed at min frequency for an extended period.
When the screen is on (aka using the phone) I'd like it to be as FAST
as possible. That's the reason I use the minmax governor.
Anyway, again, I don't mean to argue with anyone, I am just
presenting my point of view.
My_Immortal said:
However, I can't help but wonder: is this really a "problem"?
No offence to anyone, but I find that the phone is very snappy
when on max frequency... The big problem for me, would be if it
didn't go into Deep Sleep immediately after turning the screen off
and stayed at min frequency for an extended period.
When the screen is on (aka using the phone) I'd like it to be as FAST
as possible. That's the reason I use the minmax governor.
Anyway, again, I don't mean to argue with anyone, I am just
presenting my point of view.
Click to expand...
Click to collapse
Yes, it's really problem.
Higher frequency - higher power consumption. Moreover - with higher frequency CPU used with higher voltage so consumption is even more higher. So at 998 MHz CPU eats about 5 times more battery than on 246MHz.
With properly tuned governor I don't feel any real lags or slowdowns.
And, when screen is on CPU load is usually is lower than 20% at full frequency. So I don't want to waste my battery.
As I see it's possible to compile and use governor as module.
Could someone compile it? And assemble as xRecovery package?
Or point me where to read about compiling for arm, where to get tools and so on...
Karlson2k said:
Yes, it's really problem.
Higher frequency - higher power consumption. Moreover - with higher frequency CPU used with higher voltage so consumption is even more higher. So at 998 MHz CPU eats about 5 times more battery than on 246MHz.
With properly tuned governor I don't feel any real lags or slowdowns.
And, when screen is on CPU load is usually is lower than 20% at full frequency. So I don't want to waste my battery.
Click to expand...
Click to collapse
The thing is, on 245 MHz, you can't get any kind of decent performance.
Try this: set the minimum and maximum CPU frequency with SetCPU to 245 and attempt to use the phone normally.
Also, you might be right about voltage, but if the CPU is forced to work on lower freqs when it actually needs higher, there's definitely stress and increased battery consumption.
My phone lasts for more than 24 hours and it's always at max frequency when the screen is on. No lag, no freezes, no drain.
I do agree that the ondemand governor might not function as expected but I fail to experience the actual problem. That might be just me though.
Xperia X10i via Tapatalk
My_Immortal said:
The thing is, on 245 MHz with high load, you can't get any kind of decent performance.
Try this: set the minimum and maximum CPU frequency with SetCPU to 245 and attempt to use the phone normally.
Also, you might be right about voltage, but if the CPU is forced to work on lower freqs when it actually needs higher, there's definitely stress and increased battery consumption.
My phone lasts for more than 24 hours and it's always at max frequency when the screen is on. No lag, no freezes, no drain.
I do agree that the ondemand governor might not function as expected but I fail to experience the actual problem. That might be just me though.
Click to expand...
Click to collapse
There is no need to work on 245MHz as proper governor rise frequency automatically when it's necessary.
And really no stress for CPU to work an low frequency at full load. Moreover - CPU will consume more power at 500Mhz with 45% load than at 250Mhz with 95% load.
Sometime I use phone for navigation - long time with screen on and very low load. In this scenario battery drains very fast.
And last one - I like to have everything working properly. In case that I'll really need high frequency all the time I'll use other governor. I just want to have a choice.
I need a simple solotion for this too..I use z kernel and I found that Thego2s kernel fixed this problem..I was going to flash that kernel but think that has a bug and stoucks on logo ..can some one sayas a simple way?
Yes, I think a lot of people would prefer to use just small and simple fixes rather than replacing the whole kernel with a lot of nice but (personally) unnecessary features.
I am waiting for developers to release a fix for this problam

Safeness of 1600mhz

Has it ever been heard of that someone killed their gs2 from using 1600mhz in daily use?
My gs2 likes to have 1475 as a minimum voltage for 1600.
sent from I9100 using Omega
Ever rev an engine into the red? Did the engine blow up on the spot? unlikely. However if you constantly KEEP the engine in the red it will eventually break down.
Same thing for OC phones. The processor in the SGS was designed for somewhere around the 1ghz mark. Pushing it 110% likely wont kill it, they build allowances and tolerances into these things to help them last longer. Push that processor to 150% and you are risking serious damage.
Monitor the heat, if you notice its getting HOT then you should really pull the battery and let it sit for a while. Nobody here can say its safe to OC your phone like that, its a calculated risk you obviously didnt spend a lot of thought into.
TLDR: Just because you CAN doesn't mean you SHOULD.
Actually its my thought the reason I haven't been using it on 1.6 yet, and why I'm asking. Iv been ocing my pcs since the late 90s
Now the reason I'm asking here is because the cortex a9 was designed for up to 2gHz operation, but this phones design may or may not provide adequate cooling, that's why I'm asking if other people have any negative experiences with this.
Were not actually over reving the chip its more of a environment issue with cooling/ventilation.
sent from I9100 using Omega
Visentinel said:
Actually its my thought the reason I haven't been using it on 1.6 yet, and why I'm asking. Iv been ocing my pcs since the late 90s
Now the reason I'm asking here is because the cortex a9 was designed for up to 2gHz operation, but this phones design may or may not provide adequate cooling, that's why I'm asking if other people have any negative experiences with this.
Were not actually over reving the chip its more of a environment issue with cooling/ventilation.
sent from I9100 using Omega
Click to expand...
Click to collapse
You do have to have in mind that PCs are much safer to OC, so we shouldn't really compare brtween them.
Regarding the Phone OC, I haven't OC'd mine and probably never will because I have all the horsepower I need, but I think the "safest" OC is between 1.3 and 1.4GHz, since that's a range that all CPUs are designed to overtake (max 200MHz range ).
mine's been oc'ed, uv'ed pretty much within the week I bought the phone in june.
I've got it set to clock between 500-1600Mhz on demand and I've not had a problem yet. Mind you, not many tasks you do on the phone will actually require 1600Mhz and my phone's CPU clocks mostly between 500-800Mhz.
Playing some games or doing quick video conversion will push to 1600Mhz but I rarely play games on my phone and video conversion is short process - burst of 90 seconds to 120 seconds at most. So I think you should be alright so long as you don't leave your phone CPU at 1600Mhz at all times.
Like you said, it is the cooling and ventilation system on the phone, which you can't modify.. Unlike PCs, where you can install bigger fans or water cooling systems. So if the phone isn't constantly cooking itself inside, should be alright.
You should already know that OCing anything is dangerous since you overclock PCs,so I'll skip that part.
Well,if it's dangerous for the phone...It depends.Yes,the processor will die sooner.Yes,you risk frying your device.No,you don't have to push it to the limit(don't push it more that 1450μV,that's the general advice for 45nm chips).However,my thoughts are:
-I won't still have the device when it's time for its CPU to get fried,so I don't actually care.
-Something else,probably the Amoled screen,will make the phone useless by breaking sooner than the CPU will.
-This winter here is really cold(for our standards anyway),so heating has been taken care of.During hotter weather,I kept multiple temperature profiles in SetCPU,so that frequencies get lower as temperatures get higher.
In the end,what matters most to me is to have the experience I want.And with OCing my phone I get it.I'm happy with it,that's all I wanted.So,it's personal preference.Some feel they don't need it,others feel they do.Decide for yourself,that's the best advice.
PS:In case you are using Siyah kernel or CF-Root with Tegrak overclock,try lowering your clock by small steps(8Mhz is the smallest step) for a sane voltage,say 1400μV.Sometimes small increments make big differences.
Thanks for the advice guys. Appreciated.
sent from I9100 using Omega
Don´t oc sgs2.
I got my mobo fried without oc.
Service center replaced everything else but housing and screen.
I used it 2-3 hours in a row, installed programs and put it in charger.
In the morning, it was completely dead.
Overheated because of the use and charging.
So think about twice before using oc 24/7.
Buffalee said:
Don´t oc sgs2.
I got my mobo fried without oc.
Service center replaced everything else but housing and screen.
I used it 2-3 hours in a row, installed programs and put it in charger.
In the morning, it was completely dead.
Overheated because of the use and charging.
So think about twice before using oc 24/7.
Click to expand...
Click to collapse
how can you tell, that its dead because of the use and charging, if you didn't even OC'ed?
Buffalee said:
Don´t oc sgs2.
I got my mobo fried without oc.
Service center replaced everything else but housing and screen.
I used it 2-3 hours in a row, installed programs and put it in charger.
In the morning, it was completely dead.
Overheated because of the use and charging.
So think about twice before using oc 24/7.
Click to expand...
Click to collapse
I bet you didn't know there are faulty products out there that show their faults during intensive usage,eh?Mine's running at 1.6GHz(give or take a few MHz ) for months.I've played games while charging countless times.And my phone is still here,intact,so that I can write this here.
Sent from my GT-I9100 using xda premium
Of course my sgs mobo could have been faulty.
When the mobo fried it was hot, i mean hot.
I didn´t look temperatures.
It didn´t wake up even using jig.
I sended it to service.
If they had succesfully woke it up, they wouldn´t fix it on warranty (rooted).
Normally oc would be fine because it´s using powersave and underclock it.
But if you play like 2 hours on 1,6Ghz it can get too hot (over 60c on cpu).
I can´t recommend that kind of temperature.
And nobody here knows what kind of vrm´s phone has.
Also cooling plates are not designed for massive oc/voltage.
Of course temperature depends on voltage more than the clock speeds.
It´s up to user if he want to use it that kind of voltages/speeds.
I would´t use it 1600Mhz/24/7.
Generally i know what i´m talking about (using water on pc...)
Just look for temperatures and don´t give too much voltage (as low as possible).
Of course you don´t know safe voltage limits, but try and look what other have been using.
Don´t oc much if you don´t know what are you doing.
@tolis626 Hi, I have oc'd to 1.4ghz for the last few weeks, and I have under volted it to 12.75mV, the same as you, have you had any problems at that voltage? Also, is your 1200mhz voltage stable as it seems very low, to say that it was, at stock, 13mV. Furthermore, have you ever tried to under volt 1600mhz please?
Buffalee said:
Of course my sgs mobo could have been faulty.
When the mobo fried it was hot, i mean hot.
I didn´t look temperatures.
It didn´t wake up even using jig.
I sended it to service.
If they had succesfully woke it up, they wouldn´t fix it on warranty (rooted).
Normally oc would be fine because it´s using powersave and underclock it.
But if you play like 2 hours on 1,6Ghz it can get too hot (over 60c on cpu).
I can´t recommend that kind of temperature.
And nobody here knows what kind of vrm´s phone has.
Also cooling plates are not designed for massive oc/voltage.
Of course temperature depends on voltage more than the clock speeds.
It´s up to user if he want to use it that kind of voltages/speeds.
I would´t use it 1600Mhz/24/7.
Generally i know what i´m talking about (using water on pc...)
Just look for temperatures and don´t give too much voltage (as low as possible).
Of course you don´t know safe voltage limits, but try and look what other have been using.
Don´t oc much if you don´t know what are you doing.
Click to expand...
Click to collapse
I know what I'm doing.I know the risks,that's why I don't encourage anyone to overclock as much as I do.I carefully monitor temperatures and voltages over long time periods.Rest assured,I won't come back here crying.
danielsf said:
@tolis626 Hi, I have oc'd to 1.4ghz for the last few weeks, and I have under volted it to 12.75mV, the same as you, have you had any problems at that voltage? Also, is your 1200mhz voltage stable as it seems very low, to say that it was, at stock, 13mV. Furthermore, have you ever tried to under volt 1600mhz please?
Click to expand...
Click to collapse
Well,since 1400MHz and 1600MHz aren't stock clocks,you don't actually undervolt them.You rather choose a voltage for them as there isn't a standard one.
My phone is stable with the voltages in my sig(I've only changed 200Mhz and 500MHz voltages a little but too bored to update my sig ) for months,so yeah,I'd say I don't have any problems.This doesn't mean that no one will.Your phone might need 1325μV or 1225μV for 1400MHz.Every phone's CPU is unique in its own way.
@tolis626 Thanks very much, one more stupid question please, will under volting from stock Samsung voltages, even if it's stable, decrease performance compared to stock voltages on an average exynos processor please, aslo will undervolting from original kernel clock speed increase the processors life span? I have researching this and came up with nothing.
Will it break your phone? Not directly. It will shorten the lifetime.
Besides that the heat can indirectly kill your device.
I'm just curious:
Why overclocking the device? I have mine underclocked to 1 GHz max. It still has enough power to handle everything.
Sent from my GT-I9100 using XDA App
I have just been messing around. I can get 1.6ghz perfectly stable at 1350mv, I tried 1325mv and it hung up after about 2 min of use. I can also get my 1.4ghz down to 1225mv's and 1.2ghz to 1.200 it is rock stable and I haven't tried lower voltages on 1.4 & 1.2.
I am going to keep [email protected] & 1.4 @ 1250mv & [email protected]
danielsf said:
@tolis626 Thanks very much, one more stupid question please, will under volting from stock Samsung voltages, even if it's stable, decrease performance compared to stock voltages on an average exynos processor please, aslo will undervolting from original kernel clock speed increase the processors life span? I have researching this and came up with nothing.
Click to expand...
Click to collapse
No,undervolting will in fact prolong your processor's lifetime,albeit negligibly,because with less voltage less heat is generated.It's plain physics.
Overclocking on the other hand will reduce your CPU's lifetime.The damage(mostly electromigration) is dependent on the CPU and how much you overclock.Quite frankly again,you won't still have the phone when enough damage is done for it to break.If the slightly lower battery life doesn't bother you that much,I say go for it.
danielsf said:
I have just been messing around. I can get 1.6ghz perfectly stable at 1350mv, I tried 1325mv and it hung up after about 2 min of use. I can also get my 1.4ghz down to 1225mv's and 1.2ghz to 1.200 it is rock stable and I haven't tried lower voltages on 1.4 & 1.2.
I am going to keep [email protected] & 1.4 @ 1250mv & [email protected]
Click to expand...
Click to collapse
Dude,that's some nice UV!Mine instantly crashes when I set it to 1375μV at 1600MHz.You're lucky.
Oh and,most probably your phone can handle 1200MHz at 1150μV.
Sent from my GT-I9100 using xda premium
tolis626 said:
No,undervolting will in fact prolong your processor's lifetime,albeit negligibly,because with less voltage less heat is generated.It's plain physics.
Overclocking on the other hand will reduce your CPU's lifetime.The damage(mostly electromigration) is dependent on the CPU and how much you overclock.Quite frankly again,you won't still have the phone when enough damage is done for it to break.If the slightly lower battery life doesn't bother you that much,I say go for it.
Dude,that's some nice UV!Mine instantly crashes when I set it to 1375μV at 1600MHz.You're lucky.
Oh and,most probably your phone can handle 1200MHz at 1150μV.
Sent from my GT-I9100 using xda premium
Click to expand...
Click to collapse
Thank you very much for all your help I tried undervolting 1200mhz more, I got to 1075mv and it was rock stable, I don't think I am going to try anything lower than that. Just for info, I'm on SiyahKernel v2.6.2 Thanks again
CPUs care a lot about voltage and don't give a rip about MHz except for the minor heat increase. The chip in my phone is a bad clocker though. If I could get 1400mhz to work at close to the stock 1200mhz voltage I would do it in a heartbeat. Sadly mine requires a healthy bump so I abstain. At least until I can afford to replace it
Number one rule of overclocking, don't push the voltage if you can't afford to replace it
I discussed the topic of overclocking processors with a friend of mine who design cellphone CPUs. He told me that over the lifetime of a CPU, the insulating oxide layers break down. This process is considerably faster at 40% extra power and frequency. So don't expect it to last as long as a normally clocked CPU. So the question is how long it would normally last.

CPU problem

There's something odd with Snapdragon 625 on RN4 (according to me).
I have noticed that the maximum clock is half of the times coming down to 1.6GHz or less instead of 2.0GHz, especially when charging when the phone is warm (but temperature isn't high enough to trigger down clocking-- around 30-40 degree Celsius).
This also happens when the phone is not charging and I am doing some task like using apps or playing games when the phone's hardly heating up (afterall, SD 625 is known for its no heating issues).
It looks like whenever I am doing some task that doesn't involve much processing, the max clock comes down (but when I am performing some CPU intensive task such as installing an app, the max clock stays at 2GHz).
I am using interactive governor. PLEASE NOTE THAT I AM TALKING ABOUT THE MAXIMUM CPU CLOCK WHICH IS AFFECTED IN MY CASE. Using Kernel Adiutor to reset max freq. to 2GHz hardly works. It seems like the system ignores my clock settings. Even if i set the governor to performance, the max clock still keeps coming down and going up.
What's the deal with this processor?
Also, all the 8 cores are ALWAYS ON. There's no option for CPU hotplug in Kernel Adiutor.
Please someone shed some light over this.
CPU is thermal throttling not only when CPU is hot, but also when battery is hot. Also it is using a frequency which it needs, if it's using 1.6ghz it means it doesnt need more for whatever you have been doing.
k3lcior said:
CPU is thermal throttling not only when CPU is hot, but also when battery is hot. Also it is using a frequency which it needs, if it's using 1.6ghz it means it doesnt need more for whatever you have been doing.
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It also happens when the phone is not warm/hot.
Please note that I'm not talking about the current frequency that is being used, I AM TALKING ABOUT THE MAX FREQ that is pulled down and up when I am working (even when just simply using the phone for little tasks which doesn't really heat the phone up).
While using any governor, the max freq should stick to what it is set to and the current freq varies. But here, the max freq is varying along with the current freq. Is this some feature or what?
If this is actually due to heating, is the management so bad that even 35-40 degree celsius makes the CPU throttle? Generally throttling happens at much higher temperatures.
This is 14nm SoC, it has much lower temperatures but also much lower max temp. (throttling start on lower temps)
You can't heat up this CPU to 60C or more like Snapdragon 8xx for example, because it will shut down.
k3lcior said:
This is 14nm SoC, it has much lower temperatures but also much lower max temp. (throttling start on lower temps)
You can't heat up this CPU to 60C or more like Snapdragon 8xx for example, because it will shut down.
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LOL means I can't make good use of the 2GHz 8 core CPU for long because it'll heat up and simply throttle down. That's too stupid to have a powerful processor.
i am having heating issue. I found no thread discussing.. I am in Miui9 global beta version. Rooted withMagisk using redwolf twrp. My top part of screen heats in normal usage for 5 minute in wifi/data.I have checked the cpu temp( maximum 42) and battery tem( 36 to 38)..But the screen become hot..any work around? Is it a software or hardware issue? how to resolve it

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