The "Undervolting" Guide

[richierich]

Ok so on my XPS M1530 with T8300 processor, here are my rmclock voltage settings:

6x-10x @ 0.950v
11x @ 0.975v
12x @ 1.0250v

On power saving or performance on demand, my lowest multiplier is 10x since my processor is stable @ 0.950v. Pretty good, I'm glad I paid a little bit more for the T8300.

[Sa*ad159]

Ok so on my XPS M1530 with T8300 processor, here are my rmclock voltage settings:

6x-10x @ 0.950v
11x @ 0.975v
12x @ 1.0250v

On power saving or performance on demand, my lowest multiplier is 10x since my processor is stable @ 0.950v. Pretty good, I'm glad I paid a little bit more for the T8300.

That's very interesting that you kept the same voltage (0.950v) from multiplier 6x to 10x, I thought you were supposed to increase in in increments, but if it works, can't complain.

So, there is not 13x, 14x multiplier or is that not needed?

thanks again

[richierich]

Yes I was able to keep the lowest voltage settings for those multiplier settings. You only need to increase voltage if you get BSOD, crashes, etc...On the T8300 the highest multiplier is only 12x.

[deputc26]

Ok so on my XPS M1530 with T8300 processor, here are my rmclock voltage settings:

6x-10x @ 0.950v
11x @ 0.975v
12x @ 1.0250v

On power saving or performance on demand, my lowest multiplier is 10x since my processor is stable @ 0.950v. Pretty good, I'm glad I paid a little bit more for the T8300.

Yep T8300 is the sweet spot for price/performance! good decision, the penryns have *amazing* power per Watt.
you can't go lower at 12x? my T8300 was stable at .975v at 12x (I ran it at 1.0v to be safe though) and some are stable at .95v.

[chapmanenskog]

I was using T7300 and now T7800. I can use 0.85V for those low multipliers...how come penryns use 0.95V? I thought they have better undervolt ability

[flipfire]

They do,

Penryns multipliers can all run at like .950v or so.. That beats your low voltage of 0.850v, unless you can run all your multipliers at that low voltage. You are just able to set your min voltages lower but it wont be stable at those voltages. Penryns win because they can set their voltages low all around and still be stable

[jf4real13]

I am experiencing something strange on my Dell XPS M1330 with a T7500. I started out and got a max temp of 72 during the ORTHOS stress test. However, after UVing the 11.ox box in RMClock from 1.3625 to 1.2625 I ran another stress test and experience temps 10 degrees C hotter at 81!

Here is a shot of my RMClock:



Does this have anything to do with the fact that my 10.0x box is higher than my 11.0x?

Thanks for any help.

[flipfire]

the default voltages were detected incorrectly. Use the default voltages shown in my guide. Its also a T7500.

http://img379.imageshack.us/img379/701/step4ee1.jpg

Start undervolting from these voltages

[richierich]

Yep T8300 is the sweet spot for price/performance! good decision, the penryns have *amazing* power per Watt.
you can't go lower at 12x? my T8300 was stable at .975v at 12x (I ran it at 1.0v to be safe though) and some are stable at .95v.

It's weird. Rmclock doesn't detect my CPU. It only detects that it is a Core 2 Duo processor. As soon as I lower it past 1.0250v I get the BSOD. Are there any suggestions as to get rmclock to correctly detect my T8300? Maybe that's why I can't lower it? I'm assuming that my chip just isn't as good as yours.

[flipfire]

It's weird. Rmclock doesn't detect my CPU. It only detects that it is a Core 2 Duo processor. As soon as I lower it past 1.0250v I get the BSOD. Are there any suggestions as to get rmclock to correctly detect my T8300? Maybe that's why I can't lower it? I'm assuming that my chip just isn't as good as yours.

well your cpu is a Core 2 Duo. try comparing your BIOS with other XPS users.

From the looks of it, 1.025v is the limit of your processor. Ive had 2 other people with the exact same notebook as mine beat my voltage settings by a mile

be happy with what you got. whats the default 12x voltage anyway?