how to cpu undervolting ??
Voltage we definitely won't be messing with until (if) the kernel source ever comes out. The best we can do right now is support xmister's custom CPU handling script. Lower clock speeds, performance and battery consumption. I have been using it and I'm very happy with no UI lag and better battery life.
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I've never OC'd any of my phones before but was keen to try it on the Galaxy Europa as the 600MHz CPU seems a bit weedy at times. What settings would people recommend? Ideally I would like good on-demand performance, good battery life and no frying of the CPU
Thanks
I not guaranted for the results but you can try to raise to 710. I tryeid and its work for me on any of cyanogen roms.
I use smartassV2 with a frequencies range of 122-480 Mhz. For me a longer battery life it's more important than waiting a second! And if I need to play something hard I set max to an upper freq..
my 2 cent..
Has anyone damaged there s2 from undergoing?
Is there a possibility that you can damage your phone from undervolting?
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davegermiquet said:
Has anyone damaged there s2 from undergoing?
Is there a possibility that you can damage your phone from undervolting?
Sent from my GT-I9100 using Tapatalk 2
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It's a good experiment but the processor may be pushed into an usafe operating area where some people may find theirs can't cope. If it was safe the manufacturers would be doing it as standard. Don't do it if you need it to be 100% reliable. As an experiment it's very interesting and may give some worthwhile gains.
It's not going to be laggy but if you can stand a reduction in performance then slowing the clock speed is a safer way to save battery, rather than reduced voltage.
---------- Post added at 09:55 AM ---------- Previous post was at 09:44 AM ----------
Overclock and overvolt terms are very common on computer PC. However, this will increase power usage and generate more heat. Not so good to try it on smartphone. So the other ways ~ underclock and undervolt should be better on smartphone like Samsung Galaxy S II, right? Yes, to improve battery life. Underclock may not be so efficient in performance / walt ratio. But undervolt surely will improve battery life while maintain the overall performance speed.
For example, by underclock from 1.2 GHz to 1 GHz, speed performance drops 16.67% but voltage usage drops 6% only from 1250 mV to 1175 mV. Therefore, it is better to just undervolt only and keep the highest speed stage. Let’s say by reducing voltage from 1250 mV to 1150 mV at 1.2 GHz speed stage, you will get 8% voltage usage reduction while maintaining 1.2 GHz speed.
How to undervolt Samsung Galaxy S2?
1.Install custom kernel that support undervolt.
2.Install SetCPU.
3.At Voltages tab, select the desire value for each speed stages.
4.Note – try to reduce 25 mV each time.
5.Click Apply then.
6.Run Stress test ~ Stress CPU to test stability (located at Info tab).
7.That’s all.
Note – Only check ‘Set on Boot’ when you are confident that the undervolted values won’t hang and stable all the time.
Each phone has its own CPU chipset. Other people’s SetCPU voltages settings may not work for you. Therefore, you need to try lot of the settings until you get the lowest voltages and stable for daily use.
Yes. But is there potential that it will damage the phone permanently? Can it wreck the cpu?
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Very unlikely. You are far more likely to damage your phone/reduce the life of the CPU by overvolting/overclocking (logical).
Most damage is caused by users not bothering to read and follow instructions/stickies etc exactly.
Can't see electronically how UV would cause any damage to semiconductor components or electrical circuits. Maybe software issues caused by freezing or forced reboot or battery pull though.
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Main "potential danger" issue with UV, aside from poor stability and pointless "gains", is the CPU may write bad data to memory (volatile OR non-volatile) causing corruption. This can be recovered, generally, but not if it writes rubbish to the low level "boot" areas.
just dont set the voltage tweaks on boot so if you settings goes wrong
your phone restart and its back to stock voltages
than you can try new settings
i have UV mine from the kernel test thread values and its smooth and battery life is improved
First off is this a good idea? can such small devices be over clocked in a safe way without risking damaging the hardware?
if yes which would you say was the best app for doing so?
Hi,
A good idea... maybe, maybe not... it depends on what you want... higher scores in bench?A shorter battery life?A very very hot device while browsing or gaming (if you run at 1.8Ghz for example)?A little extra power for some apps/games?
With overclocking a little (1.5/1.6Ghz) I noticied that some apps open a little faster and the genera UI is a little more responsive...
There is always a (little) risk to overclock our phones, generally due to overheat but also some CPU's can't handle high overclock.
For me I don't remember reading someone burn her CPU with overclocking but...
There are still some software protections before to burn a CPU (thermal throttling, CPU temp limit before shutdown, etc...).
Obiously the duration of life could be reduced mainly if you always run at 1.8Ghz with playing games... So the "safe" way would be no overclock or a little overclock like 1.5Ghz... For you to test and decide...
For the apps: SetCpu, System Tuner... there is a bunch on the Play Store.Just for the CPU settings I would say SetCpu.
For me i will never overclock my cpu. Just install siyah kernel and it's pretty smooth in games. Overclocking will damage your cpu and maybe loose some of the performance.
I can't see the need on this device, I might experiment with uv, maybe even underclocking, but as above, super smooth on siyah, and Slim Rom
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Talking about battery life i installed darkys rom 3 onto my i9300 and the battery life is already suffering a loss of maybe around 25%. In saying that over clocking will only cause me to lose even more so ill leave it for now
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I'm too running on slim ics and siyah kernel. Best battery life and performance!
GGSunny12 said:
For me i will never overclock my cpu. Just install siyah kernel and it's pretty smooth in games. Overclocking will damage your cpu and maybe loose some of the performance.
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Overclocking won't damage your CPU unless you set crazy voltages, or let it overheat. Also, it won't lose performance... that's crazy talk. Only if it overheats will it throttle, but that only happens on large clock rates like 1.8GHz or if you're in a hot environment.
I had my old LG GT540 overclocked with no heat problems mind that was only a 600mhz cpu, had it up to 825mhz.
But we already have a powerful cpu in this phone, foe now I don't see the need to overclock.
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The best app depends a lot on your kernel and device. For example, for my Galaxy S2 the best OC was with TegraK Overclock.
With my Xoom CPU Tuner is still the best.
With the S3 I suppose CPU tuner would be alright as well, but I haven't had the urge to OC it, because I find SiyahKernel still quite unstable in the S3.
You need an overclockable kernel in order to OC your phone.
As for damages, it is hard to tell if they are permanent, but picture this: your battery will have to be recharged more often, because it will drain faster. Since batteries have a limited lifespan which depends on how many charge cycles they go through, the more often you discharge/charge them, the shorter their lifespan will be.
Also, there is no telling what kind of ill-effects the added heat can do to the phone. It may be totally harmless, but it may also affect the quality of the display, since the added heat will be right underneath the screen.
The lifespan of the CPU will be shortened: instead of being able to work well for 20 years, it will work well for 18, 17, 15, but more than enough time for us to already have replaced our S3 for organic, intradermal smartphones!
First of all, I am totally new to this forum.(I mean as an registered user)
Before that I always had the thing from the forum what I needed.
Now here is my question,
If i overclock the processor speed of my android device to a higher position, isn't it gonna take more battery power than usual?
Phone model: Xperia Live With Walkman
Boot loader: unlocked
Root Access: Rooted
Kernel: Rage 3.2
ROM: Real ICS r6
overclocking is going to drain your battery obviously.
overclocking drains more battery but gives better performance,too much over clocking makes phone heat & even hardware issues
saqib nazm said:
overclocking drains more battery but gives better performance,too much over clocking makes phone heat & even hardware issues
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My phn's original capacity is 1 Ghz
How much overclocking can keep my battery level fair and also give smoother performance without causing me any hardware issue?
Btw, Thx for the ans.:good:
Saimoon said:
My phn's original capacity is 1 Ghz
How much overclocking can keep my battery level fair and also give smoother performance without causing me any hardware issue?
Btw, Thx for the ans.:good:
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Click to collapse
Power consumption = Voltage x Voltage x cpufreq x some constant for your device. If you OC (raise the cpufreq) you will have more power consumption and more heat generation because most of the power is dissipated as heat and the heat is what damages your cpu. It is probably impossible to kill your cpu in one go, because your device should shut off when it begins to over heat (this will look like a random reboot). But you will slowly degrade the over all performance of your cpu and eventually you get to a point where you see a lot of random reboots. So if you decide to OC you probably want to also undervolt as well. This is because power consumption (and heat) scale with the square of the applied voltage. One rule of thumb is that your maximum cpufreq is actually determined by the voltage. For example, my cpu is rated to be stable at 1 GHZ and 1200 mV, so when I OC and UV, I scale the cpufreq as high as I can go, as long as the voltage is not greater than 1200 mV, for me this is 1.5 GHz.
Also remember that your cpu governor will have a big effect on your power consumption and it is probably doing a good job keeping the cpu running in the low range of the cpufreq table, so you are unlikely to see big effects of OC or UV on real life battery consumption.
every chipset is different, even though the brand and model is the same. noone can guarantee you any safe value to overclock.
Thanks Giving!
Thanks Everybody for helping me out!
I am applying 1.402 GHz :laugh:
Overclocking is not the only thing you have to think of in order to improve your phone's overall performance. The most important issue for me is choosing the right kernel and applying the right governor + I/O scheduler. From my experience with Mini (i have tried ALL available kernels and most of ROMs) I can surely say that now with my phone (ICS .587, custom ROM + kernel) overclocked to 1.5 GHz battery with minimal use (20 mins calls, 40 mins WiFi per day) lasts at least 60 hours. When I bought my phone (GB, no OC, all stock) battery was struggling to stay alive for 24 hours with the same minimal use. Conclusion: first pick the right kernel and ROM, then OC.
I'm waiting for my Nexus 9, and since it has a significantly more powerful GPU and a smaller screen than my Note 10.1 2014, it could be under clocked most likely to reach the same level of performance. Is this possible, and has anyone verified it has a noticeable impact on battery life?