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This may be a dumb question but has underclocking a CPU been shown to damage it at all? Be it longterm or short? I know excessive overclocking can take it's toll on the life of a processor and was just wondering if the opposite was true also.
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Well I'll answer with my common sense: I don't see a negative effect on the chip. Underclocking too much could effect your performance and might cause reboots. Best way to go about it is trial and error. Find a stable setting and go from there.
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radrian92 said:
Well I'll answer with my common sense: I don't see a negative effect on the chip. Underclocking too much could effect your performance and might cause reboots. Best way to go about it is trial and error. Find a stable setting and go from there.
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Click to expand...
Click to collapse
I'm not asking about stability...I'm asking about actual damage. I'm aware of what underclocking does to phone performanne. I'm asking if someone knows either from experience or from information available somewhere if it can physically damage the processor...not just an assumption...but thank you anyhow.
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Underclocking does not damage anything hardware wise. In fact all recent processors do it very often for energy efficiency reasons. Your phone its probably doing it right now. It will go to its stock rated speed (1 GHz for photon) when you run a game or something else system intensive and it will clock back down to 216 GHz (lowest stock rated speed) when you quit or anywhere imbetween depending on load.
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EDIT: Meant 216 MHz. Sorry.
MultiDev said:
Underclocking does not damage anything hardware wise. In fact all recent processors do it very often for energy efficiency reasons. Your phone its probably doing it right now. It will go to its stock rated speed (1 GHz for photon) when you run a game or something else system intensive and it will clock back down to 216 GHz (lowest stock rated speed) when you quit or anywhere imbetween depending on load.
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Click to expand...
Click to collapse
Holy crud, 216 ghz????
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You cant underclock below what it was designed for and my regular kernels keep voltage below safe values so.....
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MultiDev said:
Underclocking does not damage anything hardware wise. In fact all recent processors do it very often for energy efficiency reasons. Your phone its probably doing it right now. It will go to its stock rated speed (1 GHz for photon) when you run a game or something else system intensive and it will clock back down to 216 GHz (lowest stock rated speed) when you quit or anywhere imbetween depending on load.
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Click to collapse
Now this makes sense...thank you.
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magui43212 said:
Holy crud, 216 ghz????
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Click to expand...
Click to collapse
Its 216 Mhz...lol
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Yeah it shouldn't really have to much of an effect seeing as you are basically allowing it to do less. Just as long as you are not running to much for it to handle at its underclocked speed.... In theory at least.
I run both OC and UC setups depending upon what I'm doing IE "Charging" or "Screen off". And I've yet to see any negative effects.
Well seeing uderclocking makes it so its "walking" instead of "running" so it should be able to keep its "breath" longer.. less stress does usally me longer life. So i would say it helps your phone life overall and battery life longer overall
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No its like running with less weight
Damanis1 said:
Well seeing uderclocking makes it so its "walking" instead of "running" so it should be able to keep its "breath" longer.. less stress does usally me longer life. So i would say it helps your phone life overall and battery life longer overall
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Click to expand...
Click to collapse
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I'm curious as to which voltages people are using who choose to undervolt their device. I know I've seen some scattered posts around but am yet to see a thread, if I'm wrong feel free to close this one and direct me to the thread.
Mine are:
1200 mHz
1200 mV
1000 mHz
1100 mV
800 mHz
1000 mV
500 mHz
900 mV
200 mHz
900 mV
I made very small drops over stock as I'm pretty new to it so I didn't want to risk going to low.
I'm on UnNamed 2.2.1 with Entropy 12/08/2011 and CPU set to 1200-200 mHz on demand.
I'm trying to get an idea for what people run for the best mix of battery life and performance.
1700Mhz @ 1500mV
1400Mhz @ 1275mV
1200Mhz @ 1175mV
1000Mhz @ 1075mV
800Mhz @ 975mV
500Mhz @ 875mV
200Mhz @ 850mV
I havent done a whole lot of tweaking to find my optimal settings. Im hoping to have time to play with Zep's 3g turbocharger to see what i can squeeze out of my data with different modems. Im also about to move to UnNamed 2.2.1
http://forum.xda-developers.com/showthread.php?p=19826653
Is probably what you want.
penguinlogik said:
http://forum.xda-developers.com/showthread.php?p=19826653
Is probably what you want.
Click to expand...
Click to collapse
That is a good one, thank you.
But I'm hoping to get a voltage specific one. Your link is a full SetCPU thread.
Sent from Tapatalk using my Samsung GT-I9100
1200mhz - 1250mV
1000mhz - 1125mV
800mhz - 1025mV
500mhz - 900mV
200mhz - 850mV
100mhz - 825mV
I'm thinking I could go another -25mv across the board still.
There isn't a thread because you are supposed to figure out the settings yourself. EVERY DEVICE IS DIFFERENT. What works great for one person may crash another's device, what is just barely stable on one person's device may be far from optimal on another.
If every device were the same, THE STOCK VOLTAGES WOULD BE LOWER.
I was about to say the same thing ^^
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What app do you use to undervolt? Set CPU?
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chrikenn said:
What app do you use to undervolt? Set CPU?
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Click to expand...
Click to collapse
Voltage control
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Entropy512 said:
There isn't a thread because you are supposed to figure out the settings yourself. EVERY DEVICE IS DIFFERENT. What works great for one person may crash another's device, what is just barely stable on one person's device may be far from optimal on another.
If every device were the same, THE STOCK VOLTAGES WOULD BE LOWER.
Click to expand...
Click to collapse
These values provide a baseline for others to start from. I never guessed I could go down to 825mv until I saw another thread on the i9100 section. But I understand your point of view as well.
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I agree with Entropy but like the previous post said, I'm hoping for an idea of where people are at with theirs. I'm not hoping for 100% definitive values that work all the time every time.
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Yeah, still useful and interesting to observe others' settings in my opinion.
Sent from my Galaxy SII
Seems to be working smoothly for me. I have 1600, 1400, and 1200 disabled
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Who prefers LiveOC over the regular OC system?
Just wondering.
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I prefer to use voltage control and overclock the ol' fashioned way lol...I have played with nstools and live oc, but its more than I really need.
110%, 1320 mhz, stock voltages
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neh4pres said:
110%, 1320 mhz, stock voltages
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Click to expand...
Click to collapse
Which governor do you use? GlitchOndemand
Glitchass v2
Conservative
Interactive
Powersave
Performance
Lazy
Smoothass
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i use glitchondemand/ fiops overclocked @ 1500mhz with no undervolt.
Enyo. said:
Which governor do you use? GlitchOndemand
Glitchass v2
Conservative
Interactive
Powersave
Performance
Lazy
Smoothass
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Click to expand...
Click to collapse
Stock..
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droidstyle said:
i use glitchondemand/ fiops overclocked @ 1500mhz with no undervolt.
Click to expand...
Click to collapse
No heat?
Is this dangerous? With no overheat, is this dangerous? Are you using this day to day?
Didn't get into oc too much.
neh4pres said:
Stock..
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Click to expand...
Click to collapse
thanks so much
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Enyo. said:
No heat?
Is this dangerous? With no overheat, is this dangerous?
I've never overclocked this high before. Didn't get into oc too much.
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Click to expand...
Click to collapse
So.. You never tested 1.9 ghz before you released your kang kernel?
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neh4pres said:
So.. You never tested 1.9 ghz before you released your kang kernel?
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Click to expand...
Click to collapse
I tested it.
For a day or two.
But using my phone day to day.
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enyo... I have tested with glitch kernel at 1.7 ghz and i currently hold the record benchmark for this device on antutu using performance governor. After testing for a half hour at that speed i fell asleep with the phone stuck at that speed. I'm typing this message with that phone now. That was done with glitch v13. The most i ever got from high clock speeds was freezes and reboots.
However, if you get stupid with live oc the story can be very different.
But to give an idea of what my phone handled back then, go to the cm7 glitch thread and check what the gpu/buss speed was at 1.7ghz. But remember that those bus/cpu speeds, and voltages were finely tuned by tk , and you probably won't be able to push that hard with live oc.
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neh4pres said:
enyo... I have tested with glitch kernel at 1.7 ghz and i currently hold the record benchmark for this device on antutu using performance governor. After testing for a half hour at that speed i fell asleep with the phone stuck at that speed. I'm typing this message with that phone now. That was done with glitch v13. The most i ever got from high clock speeds was freezes and reboots.
However, if you get stupid with live oc the story can be very different.
But to give an idea of what my phone handled back then, go to the cm7 glitch thread and check what the gpu/buss speed was at 1.7ghz. But remember that those bus/cpu speeds, and voltages were finely tuned by tk , and you probably won't be able to push that hard with live oc.
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Click to expand...
Click to collapse
So just overclocking, @ 1.5GHz or 1.2GHz and, monitoring the temp, processor will last just as long as it would non overclocked?
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Enyo. said:
So just overclocking, @ 1.5GHz or 1.2GHz and, monitoring the temp, processor will last just as long as it would non overclocked?
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Click to expand...
Click to collapse
It's all luck. Chance. Fate. If tk has not burned his phone yet i would say you have a lot of catching up to do to get the mileage he has. I had mine overclocked 1.5ghz for a few months.. And guess what, i have never monitored temp. But hey, i pay an extra couple dollars a month on top of insurance for lifetime warrantee. So i think my phone burning up would fall under that. But anyway, your stressing out to much over it.
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neh4pres said:
It's all luck. Chance. Fate. If tk has not burned his phone yet i would say you have a lot of catching up to do to get the mileage he has. I had mine overclocked 1.5ghz for a few months.. And guess what, i have never monitored temp. But hey, i pay an extra couple dollars a month on top of insurance for lifetime warrantee. So i think my phone burning up would fall under that. But anyway, your stressing out to much over it.
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Click to expand...
Click to collapse
Thanks so much.
Going to over clock to 1.5, not going to stress about it. Ulcers come like that
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no heat and i use it daily...first time i can ever say this when overclocking to 1500. i agree with neh4pres posts...becareful with live oc it can screw your device up quick. most folks will never see any benifit by using live oc imo anyway. part of the reason why i just use vc...
I actually use 10% live oc and 1200mhz step... All voltages stock. Fully stable and it FLIES
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I must have every bit of speed. That said here's the setup:
ICS AKOP 25 Glitch 14 B5 for 6.0
1200 step with 118 LOC
Glitch OnDemand with some OV and UV. (see pics)
Live OC is the way to go as you get a boost to your GPU and RAM in addition to the usual CPU bump.
thisguy23 said:
I must have every bit of speed. That said here's the setup:
ICS AKOP 25 Glitch 14 B5 for 6.0
1200 step with 118 LOC
Glitch OnDemand with some OV and UV. (see pics)
Click to expand...
Click to collapse
thx a bunch for this nfo. just used ur voltage settings for my device and was able to overclock into the 1300mhz range from the 1200 step. im impressed since last time it was very unstable at 1200 for me.
thx.
swagooo said:
thx a bunch for this nfo. just used ur voltage settings for my device and was able to overclock into the 1300mhz range from the 1200 step. im impressed since last time it was very unstable at 1200 for me.
thx.
Click to expand...
Click to collapse
with the devil kernel i have been running 102% loc between 200-1000mhz. on glitch i can oc up to 1500mhz with no loc, soon as i add any loc the device freezes. im guessing my leakage is not dialed in correctly for glitch, also i get a bit nervous playing wit arm voltages.
droidstyle said:
with the devil kernel i have been running 102% loc between 200-1000mhz. on glitch i can oc up to 1500mhz with no loc, soon as i add any loc the device freezes. im guessing my leakage is not dialed in correctly for glitch, also i get a bit nervous playing wit arm voltages.
Click to expand...
Click to collapse
Try these i have not had a reboot in over a week
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What's the most battery friendly kernel?
I'm using nymphetamine.. what about you?
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In order to determine this one must flash all kernels and test each of them with the same ROM for a minimum period of 24 hours and then when they have finished that post their results.
For the record im using Franco kernel.
No doubt. Insecure kernel
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I'm using postinthewrongsection kernel.
It's the ****.
Smh...
Seriously, nobody can answer this question and yet it is still asked 20 times a week, best rom, best kernel, best modem, whatever.
It's completely subjective!!
What is good for you might be **** for someone else.
As jonny68 said already, try them out.
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nodstuff said:
I'm using postinthewrongsection kernel.
It's the ****.
Smh...
Seriously, nobody can answer this question and yet it is still asked 20 times a week, best rom, best kernel, best modem, whatever.
It's completely subjective!!
What is good for you might be **** for someone else.
As jonny68 said already, try them out.
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Click to expand...
Click to collapse
I haven't seen that, where can I download the postinthewrongsection kernel?
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Thread closed.
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brian6685 said:
I haven't seen that, where can I download the postinthewrongsection kernel?
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Click to expand...
Click to collapse
LOL!!!
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Tbh i would recommend any custom kernel that allows you to undervolt, i.e Siyah
i currently have my phone running 100mv below stock and my battery life is better than it was stock
Uv is useless in s3 seriouzly. How much can u save.
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Well think about it, 4 cores consuming 1400 millivolts each.
Undervolt by 100 millivolts and you have saved the equivalent current of 400 millivolts (100 per core).
Thats close to a third of the total consumption of one stock core.
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Undervolting is pointless unless you are planning on overclocking and want to reduce heat.
Battery savings from Undervolting are about 2-3%
This is insignificant and isn't worth the potential instabilities.
Plus it's not even a big consumer of power, The power the cpu uses is dwarfed by everything else in the phone.
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wong section. please ask Q in Q&A subforum
nodstuff said:
Undervolting is pointless unless you are planning on overclocking and want to reduce heat.
Battery savings from Undervolting are about 2-3%
This is insignificant and isn't worth the potential instabilities.
Plus it's not even a big consumer of power, The power the cpu uses is dwarfed by everything else in the phone.
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Click to expand...
Click to collapse
The CPU is still the largest consumer of power unless you have extremely bright colours showing on the screen. Plus the phone can be undervolted very far below stock settings as it is, so savings should be more than what you quoted. For gaming I'd say my mali patch would bring quite some advantage in terms of power, since the CPU lock is gone and ASV scaling on the GPU can actually take place now, Netarchy already included that into Ninphetamin.
woshiahboi said:
Thread closed.
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Click to expand...
Click to collapse
lol.. how'd that work out for ya
AndreiLux said:
The CPU is still the largest consumer of power unless you have extremely bright colours showing on the screen. Plus the phone can be undervolted very far below stock settings as it is, so savings should be more than what you quoted. For gaming I'd say my mali patch would bring quite some advantage in terms of power, since the CPU lock is gone and ASV scaling on the GPU can actually take place now, Netarchy already included that into Ninphetamin.
Click to expand...
Click to collapse
Somewhere on XDA I've been reading about some1 testing high (nearly max) voltages against as low as possible voltages (but if I remember correctly it has been a single core CPU). His result of this test was that even with such extreme voltage differences he was not able to save one percent of battery.
While I'm not too much into CPU voltages and undervolting I can't say anything about it for sure. But I'll be looking for that article...
swent said:
Somewhere on XDA I've been reading about some1 testing high (nearly max) voltages against as low as possible voltages (but if I remember correctly it has been a single core CPU). His result of this test was that even with such extreme voltage differences he was not able to save one percent of battery.
While I'm not too much into CPU voltages and undervolting I can't say anything about it for sure. But I'll be looking for that article...
Click to expand...
Click to collapse
I think I know what thread you are talking about and I completely disagree with those findings, at least on the S2 I did proper measurements myself with -100mV on various frequencies and the power advantage was almost equal to the CMOS power formula f*V² on full load applications. I advise people to stop comparing such articles from different architectures as the Snapdragons or the OMAPs as they have different types of power saving states which influence the measurements greatly. The Exynos is relatively "stupid" in terms of lower power states and relies heavily on DVFS scaling so voltage brings a greater effect on the dissipation.
hefonthefjords said:
Well think about it, 4 cores consuming 1400 millivolts each.
Undervolt by 100 millivolts and you have saved the equivalent current of 400 millivolts (100 per core).
Thats close to a third of the total consumption of one stock core.
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Click to expand...
Click to collapse
If you're so concerned with volts per core. Buy the North American version and run it on 2g lol
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Yeah well, I'm sorry if I complicated things. Just thought it's worth pointing out.
For anyone still interested: here
Probably you're right, as I said... can't argue with any of it and hopefully no1 takes my dangerous semi-knowledge as reference.
AndreiLux said:
I think I know what thread you are talking about and I completely disagree with those findings, at least on the S2 I did proper measurements myself with -100mV on various frequencies and the power advantage was almost equal to the CMOS power formula f*V² on full load applications. I advise people to stop comparing such articles from different architectures as the Snapdragons or the OMAPs as they have different types of power saving states which influence the measurements greatly. The Exynos is relatively "stupid" in terms of lower power states and relies heavily on DVFS scaling so voltage brings a greater effect on the dissipation.
Click to expand...
Click to collapse
Well you learn something new every day! Thanks Andreilux :thumbup:
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swent said:
Yeah well, I'm sorry if I complicated things. Just thought it's worth pointing out.
For anyone still interested: here
Probably you're right, as I said... can't argue with any of it and hopefully no1 takes my dangerous semi-knowledge as reference.
Click to expand...
Click to collapse
This is the same study I saw while I was using nexus s.
Tbh I completely ignored the fact that it was single core and different architecture when applying that info here. Oops.
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I'm just curious to see everyone's experience with the Faux kernel as opposed to the one that comes pre-installed.
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Capgun_Homicide said:
I'm just curious to see everyone's experience with the Faux kernel as opposed to the one that comes pre-installed.
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Click to expand...
Click to collapse
You have to read xda rules again.. Your free to use both of them and see it for your self without asking which is best in public!!
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Capgun_Homicide said:
I'm just curious to see everyone's experience with the Faux kernel as opposed to the one that comes pre-installed.
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Click to expand...
Click to collapse
I think they're both great you can't go wrong with either kernel. It's like choosing a lamborgini or ferrari, they're both awesome but it truly comes down to preference.
I think I got better battery with faux 31 but I under clocked and undervolted so I can't do a fair battery life test.
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SuperAfnan said:
I think they're both great you can't go wrong with either kernel. It's like choosing a lamborgini or ferrari, they're both awesome but it truly comes down to preference.
I think I got better battery with faux 31 but I under clocked and undervolted so I can't do a fair battery life test.
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Click to expand...
Click to collapse
I've noticed better battery life as well; not majorly, but noticeably. Although I feel it also has a little perfomance drop. Could just be me, though.
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Sorry for a question within a question, but what does undervolting/overvolting do? I've only ever tampered with MHz frequencies.
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Capgun_Homicide said:
Sorry for a question within a question, but what does undervolting/overvolting do? I've only ever tampered with MHz frequencies.
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Click to expand...
Click to collapse
Don't worry.
Undervolting is basically adjusting the voltages so the cpu uses less voltage aka electricity. It helps a little but it can make your phone unstable so watch out. Of you undervolt use the system tuner app on the market. You should definitely under clock if you want to save power too. When you undervolt be sure to underclock, and don't do it too low or your phone might freeze! That's why your shouldn't go so extreme on it.
Overvolting is basically adding more voltage to the cpu. There is no point in doing it for our amazes to be honest. It is already a battery hog. I guess it can help if you want to over clock a lot but there is absolutely no point in doing that.
In older legacy phones if you wanted to over clock because the cpu would be so weak, like 600mhz then you would have to overvolt to over clock to like 1ghz if you were lucky. Our devices are 1.5 ghz dual core and sense isn't THAT bad. There's no point in doing overvolt in this phone though.
PS, check out my rom in the development section.
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SuperAfnan said:
Don't worry.
Undervolting is basically adjusting the voltages so the cpu uses less voltage aka electricity. It helps a little but it can make your phone unstable so watch out. Of you undervolt use the system tuner app on the market. You should definitely under clock if you want to save power too. When you undervolt be sure to underclock, and don't do it too low or your phone might freeze! That's why your shouldn't go so extreme on it.
Overvolting is basically adding more voltage to the cpu. There is no point in doing it for our amazes to be honest. It is already a battery hog. I guess it can help if you want to over clock a lot but there is absolutely no point in doing that.
In older legacy phones if you wanted to over clock because the cpu would be so weak, like 600mhz then you would have to overvolt to over clock to like 1ghz if you were lucky. Our devices are 1.5 ghz dual core and sense isn't THAT bad. There's no point in doing overvolt in this phone though.
PS, check out my rom in the development section.
Sent from my HTC_Amaze_4G using Tapatalk 2
Click to expand...
Click to collapse
I just saw it in Venom Tweaks and was curious. The most I underclock to is 1 GHz; cuts down the CPU maximum by a third and doesn't hinder performance to much. What voltage would you recommend at that clock speed?
P.S. I have I plan on flashing it to try it out when I get WiFi access. Trying to cut down data usage since I don't have WiFi at home.
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Capgun_Homicide said:
I just saw it in Venom Tweaks and was curious. The most I underclock to is 1 GHz; cuts down the CPU maximum by a third and doesn't hinder performance to much. What voltage would you recommend at that clock speed?
P.S. I have I plan on flashing it to try it out when I get WiFi access. Trying to cut down data usage since I don't have WiFi at home.
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Click to expand...
Click to collapse
1ghz is perfect. As for voltage it really varies but I subtract 75 or 50 mv from all voltages.
PS. Oh nice, hope you get wifi soon then.
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