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
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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
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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
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
I don't know if this is tandard on all kernels but on my kernel for example the steps are like that:
1000mhz=1175mv
1100mhz=1225mv
1200mhz=1275mv
Now at THIS point it starts getting weird. Suddenly the voltage increases by 25mv each
1300mhz=1300mv
1400mhz=1325mv
then it's 50 again
1500mhz=1375mv
then 25 again
1600mhz=1400mv
I know a bit about overclocking and overvolting CPUs. And I know that the higher you go the bigger the steps to increase voltage have to be (assuming you always choose the lowest voltage possible on which everything is stable). That's just due to physics. And now the opposite is the case... Why is the step from 1,5ghz to 1,6ghz only 25mv but from 1000 to 1100mhz it's 50mv? This doesn't make much sense.
Seriously no wonder that my phone is instable on 1600mhz. I guess the voltage just isn't high enought so the transistors aren't able to do their job properly within that short amount of time they're given at 1,6ghz.
Are the voltage steps like that on every kernel?
Frozenthunder said:
I don't know if this is tandard on all kernels but on my kernel for example the steps are like that:
1000mhz=1175mv
1100mhz=1225mv
1200mhz=1275mv
Now at THIS point it starts getting weird. Suddenly the voltage increases by 25mv each
1300mhz=1300mv
1400mhz=1325mv
then it's 50 again
1500mhz=1375mv
then 25 again
1600mhz=1400mv
I know a bit about overclocking and overvolting CPUs. And I know that the higher you go the bigger the steps to increase voltage have to be (assuming you always choose the lowest voltage possible on which everything is stable). That's just due to physics. And now the opposite is the case... Why is the step from 1,5ghz to 1,6ghz only 25mv but from 1000 to 1100mhz it's 50mv? This doesn't make much sense.
Seriously no wonder that my phone is instable on 1600mhz. I guess the voltage just isn't high enought so the transistors aren't able to do their job properly within that short amount of time they're given at 1,6ghz.
Are the voltage steps like that on every kernel?
Click to expand...
Click to collapse
I'm on Siyah 2.6.14 Voltage Control setting as follow:
I/O = bfq & Governor = ondemand
1600Mhz - 1500mv
1400Mhz - 1300mv
1200Mhz - 1200mv
1000Mhz - 1100mv
800Mhz - 1000mv
500Mhz - 950mv
200Mhz - 900mv
100Mhz - 900mv
I've applied these setting as default at bootup with no problem.
OC to 1600Mhz + set to Performance gives me 6800-6990 benchmark score in Antutu.
Which kernel are you on?
Siyah 3.2
I see you are using 1,5V on 1,6ghz. Maybe that's why you running stable?
When I set max clock to 1,6ghz and 1,4V at that clock then I get random app crashes/freezes... Once I tried shutting down my phone and it made some very loud and creepy noise... Some very loud beeping. It was definitely not the shutdown sound of the rom.
On my stock rom I just get random reboot.
Can you also permanently work on 1,[email protected],5V (setting min clock to 1,6ghz) without freezes/crashes?
Also funny that at 1400mhz you are on 1,3v while standard on siyah 3.2 is [email protected],4ghz
While 1600mhz is lower voltage again.. This is messed up
Frozenthunder said:
Siyah 3.2
I see you are using 1,5V on 1,6ghz. Maybe that's why you running stable?
When I set max clock to 1,6ghz and 1,4V at that clock then I get random app crashes/freezes... Once I tried shutting down my phone and it made some very loud and creepy noise... Some very loud beeping. It was definitely not the shutdown sound of the rom.
On my stock rom I just get random reboot.
Can you also permanently work on 1,[email protected],5V (setting min clock to 1,6ghz) without freezes/crashes?
Also funny that at 1400mhz you are on 1,3v while standard on siyah 3.2 is [email protected],4ghz
While 1600mhz is lower voltage again.. This is messed up
Click to expand...
Click to collapse
I face lots of apps crashed/Forced closed before someone refer me to here:
http://forum.xda-developers.com/showthread.php?t=1466017
Take a look....
i neva do oc , but had tried ov an phone simply was not stable as out of the box.as my sig says iam good wiv 520 apps right now wiv decent batt life and good speed,only thing u got to kno wat ur phone can handle..
Hi XDA'lers,
I think it would be interesting to collect some stats on the undervolting capabilities of our mantas. Hopefully it helps others who also intend to save some energy by doing this. If you want to participate, please post your lowest possible settings exactly like this:
CPU:
Code:
% MHz= [ 100, 200, 300, 400, 500, 600, 700, 800, 900,1000,1100,1200,1300,1400,1500,1600,1700,1800,1900,2000,2100];
BR
900, 900, 900, 900, 900, 912, 925, 950, 962, 987,1012,1037,1075,1100,1137,1187,1225,1250,1275,1300,1325; % [email protected]_kernel_name_and_version (hotplugging_state)
% BR
GPU:
Code:
% MHz= [ 100, 160, 266, 350, 400, 450, 533, 612, 667, 720];
BR
900, 900, 925,1000,1050,1100,1150,1200,1250,1300; % [email protected]_kernel_name_and_version
% BR
... and don't forget to replace the default mV values in the third line by your own ones. Please write your username, kernel, and hotplugging state where indicated.
You can find out whether hotplug is enabled or not, if you have a look at your governor adjustments, or watch the state of the second core when idle (for example in the KTweakerT app).
~ Rules ~
Each CPU value should run stable for at least 30 minutes under stress-testing conditions. (Use some tool like for example the "Classic Stability Test" within the app "StabilityTest", or "SetCPU".) Don't use HD videos or something like that for stress testing, they are a joke to our CPU. :laugh:
If you don't adjust certain values, like for example CPU frequencies above 1700 MHz: Do not write '0'. Please leave it at the default value.
Be honest. We love you for your personality, not your Android. (If you want to submit anonymously, you can write me a PM as well.)
Don't let your kernel config app set test values on boot. :silly:
Your settings should not impair the usability of your device at all. (Crashes upon governor scaling for example.)
GPU voltages can sometimes be set below device minimum, however, we want to collect values that allow an unimpaired experience with no graphical glitches at all.
If you want to copy values from others, be aware that their best settings are not the best for you. Every Nexus 10 is different, and there is the risk that some voltage is unstable on your system. If it works anyway, you save power by applying the settings, but chances are that you could find even more efficient values! To maintain statistical significance, please do not post settings that you copied from someone else.
~ CPU Release 2013-04-29 ~
~ GPU Release 2013-04-29 ~
Top: A graph that estimates the total amount of dissipated power. Beware of the horizontal line, as it is the highest value that Samsung and Google have designated. Here you can see, how undervolting and overclocking can combine to higher performance without higher heat emission (with Enigma's Crème de la Crème Preset up to 1900MHz CPU clock). This way you actually can safely overclock the CPU. (pingguo is not responsible for any damages on devices other than his own. They are in perfect condition, though. I'm just saying this because everyone does.)
On the left, you can see the differences between the default voltages and custom values.
The right side indicates the power consumption compared to default values. This might be the most important graph!
Source: http://en.wikipedia.org/wiki/CPU_power_dissipation
Matlab-Sourcecode, for the enthusiasts:
Code:
ping = [ 100, 200, 300, 400, 500, 600, 700, 800, 900,1000,1100,1200,1300,1400,1500,1600,1700,1800,1900,2000,2100];
guo = [ 900, 900, 900, 900, 900, 912, 925, 950, 962, 987,1012,1037,1075,1100,1137,1187,1225,1250,1275,1300,1325; % DEFAULT
800, 800, 825, 850, 875, 875, 900, 900, 925, 950, 975,1000,1025,1050,1075,1100,1125,1160,1200,1250,1290; % Butterlicious, Margarine 2013-04-24
750, 750, 775, 800, 825, 825, 850, 850, 875, 900, 925, 950, 975,1000,1025,1050,1075,1110,1150,1200,1240; % Crème de la crème 2013-04-24
785, 785, 785, 785, 785, 790, 795, 815, 835, 865, 890, 915, 955, 985,1015,1055,1095,1125,1165,1205,1325; % PINGGUO
% 760, 760, 760, 760, 760, 765, 770, 790, 810, 840, 865, 890, 930, 960, 990,1030,1070,1125,1165,1205,1325; % PINGGUO-AGGRESSIVE
];
ref = ones(length(guo(:,1)),1)*guo(1,:);
pingg= ones(length(guo(:,1)),1)*ping;
hvhf = ones(1,length(ping)) *1700*1225^2; % max. f*V^2 with default settings
subplot(2,1,1);
plot(ping,[pingg.*guo.^2;hvhf]);
axis([ping(1),ping(length(ping)),0,4E9]); % set Y limit so that it looks nice
xlabel('Frequency / MHz');
ylabel('f * V^2 ~ Power Consumption (Arbitrary Units)');
title('Total Power Consumption; Horizontal Line = Maximum with DEFAULTS');
subplot(2,2,3);
plot(ping,guo-ref);
axis([ping(1),ping(length(ping)),-200,20]); % adjust Y range if necessary
xlabel('Frequency / MHz');
ylabel('Voltage Offset (V - V_{DEFAULT}) / mV');
title('Nexus 10 CPU Undervolting: Voltages');
grid;
subplot(2,2,4);
plot(ping,(guo./ref).^2*100);
axis([ping(1),ping(length(ping)),0,110]);
legend('DEFAULTS (KTManta-04-19-2013)','PRESETS Butterlicious, Margarine (EniGmA1987)','PRESET Crème de la crème (EniGmA1987)','[email protected] (Hotplugging OFF)','Location','SouthEast');
xlabel('Frequency / MHz');
ylabel('(V / V_{DEFAULT}) ^2 ~ Power Consumption (Percentage)');
title('Relative Power Consumption');
grid;
Most of this ugly piece of code works automatically for everything, just write into the matrices and check the lines with commentaries. :silly:
Cheers,
苹果
Bus overclocking is not something the user controls, the kernel sets that. The previous 3 versions of the KTmanta kernel all have a 25% bus overclock, Trinity also has this same thing. But the latest version of KTManta does not have a bus overclock. So people need to specify which kernel version they are on so that everyone knows what features it has.
EniGmA1987 said:
Bus overclocking is not something the user controls, the kernel sets that. The previous 3 versions of the KTmanta kernel all have a 25% bus overclock, Trinity also has this same thing. But the latest version of KTManta does not have a bus overclock. So people need to specify which kernel version they are on so that everyone knows what features it has.
Click to expand...
Click to collapse
Thanks for the comment, I updated the code template.:good:
Preview online, just to let you know what I intended.
Currently I am trying to fix the sleep of death that my Nexus 10 is suffering from... Advice would be highly appreciated.
(It does not wake up when I press the power button after some screen off time. Only a hard reset brings it back to life.)
Edit: I am not yet sure about it, but seemingly, the problem does not occur when I use a governor which keeps both cores running at all times...
pingguo said:
Preview online, just to let you know what I intended.
Currently I am trying to fix the sleep of death that my Nexus 10 is suffering from... Advice would be highly appreciated.
(It does not wake up when I press the power button after some screen off time. Only a hard reset brings it back to life.)
Edit: I am not yet sure about it, but seemingly, the problem does not occur when I use a governor which keeps both cores running at all times...
Click to expand...
Click to collapse
Are you using the KTmanta kernel? If you have hotplugging enabled and you undervolt too much, sleep of death will occur.
For me, I have to raise my minimum voltage to 830 with hotplugging enabled to prevent sleep of death.
If I have hotplugging disabled, I could undervolt way low than that
c19932 said:
Are you using the KTmanta kernel? If you have hotplugging enabled and you undervolt too much, sleep of death will occur.
For me, I have to raise my minimum voltage to 830 with hotplugging enabled to prevent sleep of death.
If I have hotplugging disabled, I could undervolt way low than that
Click to expand...
Click to collapse
Yup, I'm on KTManta. Also, hotplugging seems to be exactly the reason for my SODs.
Now the big question is: What is more efficient - Hotplugging and thus saving 50% of the power, or stronger undervolting, saving 25%, and maybe more effective racing to idle with both cores?
BTW, are you implying that hotplugging is always performed at the lowest possible frequency?
Edit: There is still one thing that puzzles me: Hotplugging while the screen is on works perfectly fine at the voltages which cause the SOD...
pingguo said:
YWhat is more efficient - Hotplugging and thus saving 50% of the power, or stronger undervolting, saving 25%, and maybe more effective racing to idle with both cores?
Click to expand...
Click to collapse
Hotplugging doesn't save 50%. The theory of it does but actual execution that is not even close to possible. It saves 2-3% battery
This may seem like a very noob question, but I am running the nightly builds of CM10.1 and I just installed the KTmanta kernel but I don't see where to change any governor settings. Is it an app I need to install? Help?
EniGmA1987 said:
Hotplugging doesn't save 50%. The theory of it does but actual execution that is not even close to possible. It saves 2-3% battery
Click to expand...
Click to collapse
Well, then I feel very comfortable with undervolting only. :laugh:
parakalien said:
This may seem like a very noob question, but I am running the nightly builds of CM10.1 and I just installed the KTmanta kernel but I don't see where to change any governor settings. Is it an app I need to install? Help?
Click to expand...
Click to collapse
Install the KTweakerT app from the kernel forum thread.
Updated the CPU graph with some overclocking data. Please let me know whether or not it is true that OC with no increase in heat emission is safe.
Update:
Graphs should be more comprehensible and informative.
Added full source code for you source lovers.
Cheers!
pingguo said:
Updated the CPU graph with some overclocking data. Please let me know whether or not it is true that OC with no increase in heat emission is safe.
Click to expand...
Click to collapse
The three most damaging things to a processor are: amperage, voltage, and heat. Heat is tricky, because every processor has a maximum heat limit it is designed for. The more heat you have the less life your processor will have. However, if you stay within its maximum heat limitations then the processor will still last many many years, as soon as you get above that heat limit you start damaging the processor extensively, greatly lowering its lifetime and possibly causing irreparable damage in that you can no longer run at the higher core speeds stably anymore. So you always want to stay within heat limitations, preferably as cool as you can.
Amperage is also highly damaging to processor silicon, but thankfully we dont really control this up or down on most processors. One good example of this can be seen with RAM, which you can control amperage on. The best example here is RAS to RAS timings, which is when the RAM chips get pulsed with large amounts of amperage. It has been many many years since I looked into the technical details of this, but I *think* this happens when a row of addresses is pre-charged before access or something like that. Normally this happens every 4-6 cycles on average. Many people in order to increase stability of their RAM overclocks would lower this, I even did some stuff for a while with a setting of 1 for this timing. Because of low values on this timing the RAM is getting pulsed with large amounts of amperage quite frequently and this was causing massive degradation of the cell structure and creating micro-holes in the silicon. These holes then in turn require more amperage to remain stable at your MHz speed in order to overcome the damage, and with the higher amperage needed you continue to accelerate the damage. It is just a snowball effect of damage to the RAM chips that leads to complete death of the chip in a few months. This was why you saw large failure rates on DDR2 RAM at one point "back in the day" when D9GKX and GMH chips were all the rage. So all that to say, large amperage is bad for computer chips.
Next up is voltage, which we do control. More voltage is needed for high MHz speeds as we need to make the transistors switch faster and have more power to give in order to achieve higher speeds. Higher voltage leads to greatly increased heat output, greatly increased battery drain, and also if you are using voltage above the chip's specifications causes damage to the processor itself. Lowering voltage is the best thing we can do to keep our processors running at their best. A tiny decrease in voltage will often be 1-2 degrees cooler in temperature, and usually means a few less watts as well (depends on chip architecture). Just last week I was overclocking an Intel i7-3930K processor. I had fun playing around with it and observing the changes happening. I observed with 1.4v and 4.5GHz core speed than power draw was 198 watts under 100% load. Going to 4.6GHz raised power draw up to a nice even 200 watts (2 watts more for 100 MHz). I then went back down to 4.5GHz speed and increased the voltage from 1.4v to 1.42v, and saw a temperature increase of 4-5 degrees on all the cores and a 6-7 watt power consumption increase. Just from raising the voltage that little bit.
So the best thing we can do for our tablets is to undervolt. But when overclocking, as long as you stay within the chip's voltage limits and heat limits, the extra core speed doesnt really affect the chip's lifetime at all, until you get many MANY MHz ahead of its design. if you can overclock up an extra 300MHz while still dropping voltage a bit you will see both a reduction in power consumption (even with the extra speed) and a reduction in heat. Although these reductions will not be as much since we are also generating small bits more of power draw and heat from the higher speeds too.
TL;DR
overclocking is fine and wont damage your processor as long as you remain at the same or less voltage and heat output.