The "Undervolting" Guide

[ATG]

Is it 100% necessary to test the maximum temperature? I'm just afraid as I'm using a new laptop. But I want to undervolt it to preserve it's battery life.

Well yeah..you want something to compare results...and you must stress the CPU anyway to test the voltages..

[NCG1589]

Hi, i just got a brand new sager 2092, and when i ran RM clock it says that my CPU is running at 1250Mhz, when i have a 2.5Ghz T9300 CPU. It also says that im running at 6x multiplier when i should have 12x. Any clue whats up?

Heres a SS of my RClock: http://img167.imageshack.us/img167/7622/14844386fj0.jpg

[Tusin]

I really really wished the search function worked.

NCG it is fine, that is what is called speedstep. Follow the guide.

[pattertj]

It has been awhile since I posted in this forum, I usually post more in the Tablet Forums... I saw your guide and gave it a shot. I must say I am incredibly happy with the results....

Fujitsu T4220, Intel Core 2 Duo T7100 1.80GHz, 3GB PC2-5300 G. Skill, 120GB Hitachi 5400.3



At top speed the Voltages fell 12.77%, Average Temps fell 8.39%, and Average Battery Discharge Rate fell 19.86%!!!

Thank you so much for this great guide! I really hope my new HP tx2500z can pull of similar figures when it arrives. I'll post details again once I have completed the process.

Wow...

I got the temps from RMClock's logging feature and took the average of a one (1) minute sample after five (5) minutes of running OCCT with RMClock's built-in polling intervals.

The battery life was pulled from a trial copy of Passmark's BatteryMon. It was the average of a (1) minute sample after five (5) minutes of running OCCT with one (1) second polling intervals.

[flipfire]

Thanks for the documented benchmarks. Never really had a chance to benchmark the discharge rate. At least now i can put an estimated figure on it, 20%.

Im afraid you wont be able to undervolt your new tx2500, due to the puma platform. RMclock most likely wont recognise it at all. Rightmark has been way behind schedule with their program updates.

[Le_Meow]

Hello everyone!

I'm currently undervolting my new AW M15x with the T9300 2.5ghz Core 2
So far i've tested the top multiplier down to it's lowest stable setting (1.0125 down from 1.1375) and had a nice 10C (at least) temp drop at load.
Now i'm working on my next lowest setting, and i've just finished testing 0.9875v and it's stable.
The whole point of this post is this:
There are only 4 more voltage drops I can do through RM clock (stops at 0.9500v). Should I stop at any vertain point? And if not, is it fine to have a few multipliers all at that lowest setting?
Thanks!

[pattertj]

I don't think so. As long as it is stable, you should have no problems if the bottom few voltages are all equal.

[Ahmed_p800]

WOW

Great tut.

And thanks A loooooooooot

My temps 91 ----> 68 C !!!!

I cant believe it my self!!

And that's only 0.1 volts drop

Gonna try another 0.1 v.....lets see what will happen

Does this affects the GPU temps (I now it was said in the tut but i want to make sure)

[flipfire]

The whole point of this post is this:
There are only 4 more voltage drops I can do through RM clock (stops at 0.9500v). Should I stop at any vertain point? And if not, is it fine to have a few multipliers all at that lowest setting?
Thanks!

Yes you can go as low as you possibly can. But to ensure stability i suggest leaving a voltage margin of 1-2steps higher.

If you can run ALL multipliers on .950v, then you are the very lucky.

Does this affects the GPU temps (I now it was said in the tut but i want to make sure)

If your gpu and cpu share the same cooling pipe/heatsink then Yes.

It will make your whole notebook somewhat cooler

[gekk_gad]

i'm new to the forums since i also just got my laptop last week. i have sucessfully undervolted an acer 6920g (t5550) to its lowest possible voltage of .9500v for the max multiplier. max temp went down from 64C to 37C under load!