The "Undervolting" Guide

ok thanks.
the only downside is i dont think it auto starts at launch of windows.
do u know where there is a good tutorial to use it which is as helpful as this one?

 

CrystalCPUID ?
Yeah, it won't auto-start and automatically apply the lower voltages.

I don't know of a tutorial, but all that I do in it is goto Function > EIST > And apply the multiplier and voltage you want. You can also add a shortcut to it. You'll have to compare the voltages in CCPUID with the voltages shown in either CoreTemp or RMClock or CPU-Z v1.41, since CCPUID mainly shows desktop voltages, but the increase/decrease in voltages in kinda relative. If you use it, you'll figure it out.

There is a Multiplier Management Setting in it as well, but I haven't tried that.

 

Awesome, my T3200 runs at .950 for all multipliers except 12 which is .975, which is .275 volts under stock. Max temps are in the low 60's C.

 

First off i'd like to thank you FlipFire, you've written a fantastic guide. My T7250 (@2GHz) now runs using 0.9875V down from 1.1750V, before undervolting my Max Temp was 91C but now it's 75C :O

I've just got to try and figure out the rest of the multipliers now lol

 

Yes RMclock cannot recognise half multipliers causing it to use the 8x multiplier and downclock.

You should write up a guide for CrystalCPUID as an alternative for this guide.

To run it on startup you can easily just use windows task scheduler.

Good stuff.

Thanks.

Should be very easy to find the rest of the multipliers. Since your top multiplier reached 0.9875v, it means the multipliers below that will run a lower or close voltage.

 

Yeah i'm going to start the rest of the multipliers at 0.9875V and see where I get.

I'm not looking forward to running the stress test for a few hours for every multiplier though haha, this is going to take a while

 

Ok, I'll work on a guide for those who basically miss out due to half-multipliers or have issues running RMClock.

But its still not confirmed if CCPUID supports 0.5-multipliers or not.

 

cool post in here when the guide is up

 

@msparrow88: Errm....You have a P8400, why don't you confirm for us whether CrystalCPUID actually supports half-multipliers or not.
(I don't have a Penryn)



If possible, post/attach a screenshot with the multiplier drop-down box open.

 

I think a potential problem with undervolting on many Asus Gaming laptops is in relation to GPU overheating. I think that a cooler running CPU might cause more chance of GPU overheating or stuttering because the CPU fans may kick in later. Just a thought since I have not done any testing.

 

I am just trying this out tonight on my Gateway M-6862. I do have a question though. My highest multiplier is X12 and the default is 1.25v. The lowest number on the drop down menu is 1.15. It says in the guide that .100 is the minimum amount you should be able to drop your highest multiplier but .100 seems to be the highest amount I am able to choose. Am I doing something wrong or is that just the max amount I can lower it on my computer? Thanks.

 

In RMClock ?
Did you select "Mobile" CPU type ?

 

Yes and yes.

Edit: Though I did just finish the Orthos test and despite dropping it only .100 I did manage to drop 9C on the processors. Not too bad I guess.

 

What CPU is it?

 

Run "RMClock_WipeOut.reg" in the program folder to reset everything, and then see if you can go lower. And also compare the voltages with CPU-Z v1.41.

I guess T5750..

 

Yes it's a T5750 (although that cpu-z program says it's a T7200 in the processor name but does say T5750 in specifications). I'll try resetting it tomorrow. Although for now everything is working smoothly and I don't feel like messing around anymore tonight. Thanks again.

 

yes it does offer .5 multipliers...
here is a screenshot, is this wat u meant?

 

Ok so the problem seemed to correct itself when I turned on the computer this morning. I now have a lot more options. Thanks for the help and thanks for the guide.

 

would uninstalling the RightMark set everything back to default? Or do I have to manually set it back? or how do it reset it back to OEM? I tried to wipeout.reg but the setting are still not back to OEM specs.

 

Ok, something is wrong man. my CPU is now running on MAX @ 1.995mhz where before it fluctuated from .995 to 1.995 via speed step.

 

Close RMclock and run RMwipeout.reg, delete the RMclock folder and restart your notebook. This will definitely remove it.

After its restarted, use CPU-z to confirm its gone.

You must have forgotten to restart RMclock when switching from Desktop/Mobile modes.

 

Hi there!
I'm using a Dell XPS M1530 with a T8300 2.4GHz processor. I've just undervolted it, and my original maximum voltage (at x12) was around 1.15V, where I was hitting about 67C. I undervolted it to 0.9875V, and now I'm getting about 60C. Is this good?
Also, my minimum voltage option is 0.9V, and so everything at 10x and below is set to this (all tested for stability). I feel that I could get much lower on the lower multipliers but I don't have the option to lower it anymore. Is there a way to lower the voltages even more?

Thanks in advance, and great guide flipfire!

 

A quick way to do this is to work upwards instead of downwards. Set the voltage of the next lowest multiplier to something quite low (e.g. 0.04V less) and if that crashes (as it probably will do) increase the voltage by one step. It saves you sitting through countless hours of stable tests, as you'll only reach 45 minutes once or twice before you are happy with that voltage.

 

Yes 60c is quite cool, your notebook was running cool to begin with, thats why you didnt see big difference in temps. You should see more battery life though.

Intel has locked the lowest voltage possible after the Pentium M's. If they left it unlocked, we would be able to reach .700v's . Theres no other way around this im afraid.

 

why are the cores constantly running near max/at max with this mod?

 

They shouldnt be, you must have missed something.. What CPU is it?

 

I only edited the settings shown on the 1st page. This is a T7200. I did a reg wipe and deleted the RMclock and the cpu is now running normal.

 

I decided to do it. Finally.

D:

 

flipfire should be paid a **** load for writing this guide, just imagine all the energy (translated---bill) that is saved!!

Successfully undervolted my P7350 @2.00GHz from 1.1375V to 1.0000V, I feel it could be tuned down even more, however 1.0000V is the lowest value RMClock 2.35 allows me to set --- is this normal because I've read quite a few people have their options on voltages below 1.0000V?

Also, the P7350 only has two avaliabe multipiers(FID), 6.0× and 7.0×(which is actually 7.5×), both types of which are labelled "normal" so I cann't try the "SuperLFM" mode.

Last but not least, it has been mentioned that RMClock will *underclock" a CPU with half integer multipiers as in my case. But when I was testing, although the "Throttle" under the CPU Info tag did show 1866.xxMHz, the "Core clock" showed 2000.xxMHz. This raises my question that is it actually underclocked by RMClock thus running at a lower speed, or does it just show up as underclocked but is actually running at full speed?

Apologies if this has been explained...

Thanks in advance gurus!

PS: I also tried RMClock on my old lappy with a Celeron 1.5GHz (Northwood), but the "CPU performance states editor" in the main profile shows nothing (Auto-adjust VID unticked), and in generality there aren't many options to tick anywhere in the program, I guess it's impossible to undervolt it? I'd really want to do it though since it is getting very hot, it must be the vents getting dirty but I just don't feel like to mess with the inside of a laptop.

PPS: RMClock didn't recognize P7350 either...

 

lol, I can't have the SuperLFM activated at 6x as it slowers even my typing in this forum at the reply boxes .... lol. Sure the CPU does 600MHz with the 6x multiplier instead of the 8x, but can't have it like that.

I'm gonna use the SuperLFM only when on battery at 6x multiplier, to save power.

so far I'm using these settings (on my T7500)

0: SuperLFM 6x - 0.8500 V (disabled on AC power)
1: Normal 6x - 0.8500 V
2: Normal 7x - 1.0000 V
3: Normal 8x - 1.0250 V
4: Normal 9x - 1.0500 V
5: Normal 10x - 1.0750 V
6: Normal 11x - 1.1000 V
7: IDA 12x - 1.1250 V ( <-this can get reduced to 1.1000 Volts (if stable), or get disabled since the computer uses it too often)

see my pattern

So far things work good, though I did stress test of 10 min only. Don't know temp drops since I have fan control program that takes care of extreme heats (GPU is overclocked). So I hope I'll get some extra battery time

If anybody can post their T7500 configuration, I would appreciate it. I know it wont matter so much as each chip is on its own, but still.

EDIT: playing with the up and down transition intervals (sub-profiles page down) yields different OS usage Right now I got them at 100uS up time (can't do less), and 1,000uS down time (100uS causes too much ups and downs, so delay a bit more works good)

 

is there any way to save my RMclock profile/settings? i want to do a fresh install and i want to keep my RMclock settings
thanks

 

Capture a screenshot of the voltages assigned.

 

i tried that and whenever i tried to set the voltages back i got a bsod, maybe it's just me tho.

 

Be a bit more specific. Tried what? Set the voltages back to what?

 

For some reason even after applying the modified voltage and testing, it doesn't seem to get applied in CPU info or monitoring, it's still running at 1.1375v on 12x (maximum).

Also, are temperatures supposed to fall instantly on ending the Orthos test? THRM fell from 67 to 44, and the cores fell from 55 to 27 in the time it took for the fan to slow back down.

 

those didn't work so good since I got some BSOD while playin Assassin's Creed, a game that is very intensive on CPU power .. I noticed Orthos however passed at 1.1000 V at the 11x ... hm

so the new settings are with 25mV higher:

0: SuperLFM 6x - 0.8500 V
1: Normal 6x - 1.0000 V
2: Normal 7x - 1.0250 V
3: Normal 8x - 1.0500 V
4: Normal 9x - 1.0750 V
5: Normal 10x - 1.1000 V
6: Normal 11x - 1.1250 V
7: IDA 12x - 1.1250 V

since my 6x muntiplier got higher voltage as well, I re-enabled the SuperLFM. However, if it keeps giving me problems then I'll have to up the multiplayer to 8x or more :|

the IDA is also active now.

transition times stay 100 for up and 1,000 for down time

 

Disable IDA, thats whats probably causing the issues.

Ill post my settings when i get home. Your 6x-9x looks quite high.

 

im trying to undervolt my friend's laptop, and its a merom dual core. i lowered the voltage to .9500 all across from 6x to 9x. but when i check the chart, i see that vid spikes to the max 1.25 at times. i read about doing a wipeout and redo the settings but it didnt help. is there anything else i can do? i disabled IDA on the bios as well. weird thing is that rmclock doesnt give IDA as an option whether i have it activated from BIOS or not.

 

Hello!

First of all.. Great guide congratz


I read all the guides in this site along with some more from other ones and here are my results:

Laptop : HP-pavilion dv-5 1030
CPU : Intel Mobile P8600

multipliers default voltage : 1,1125V

Stable undervolted :

9 --> @ 1.0 V
8 --> @ 0.9250 V
7 --> @ 0.9125 V
6 --> @ 0.9 V

I worked as follows:

decreased the voltage by small steps and tested each one..

My last stable voltage in every multiplier was tested for more than 3.5 hours and instant gaming after that.

If it prooved to be stable i increased the voltage 1 more step and set it at that value!
ie: 9 multiplier was solid stable @0.9875V running orthos for 4.5 hours and 2 hours gaming after that! Then i set it 1 step higher just to be extra safe-stable!


What do u think of my voltages? I like the more than the old ones

I guess other CPUs same as mine could go even lower but i wasn't lucky enough

Temps are lower but i haven't wrote them down Maybe i will post them later!

 

That's good, although if you can run orthos for 4.5 hours and gaming for 2 hours, it's probably stable where it is. Your processor can only run at a maximum speed, 2.4GHz in your case, and so it will have a maximum voltage usage level too. It's not likely to rise higher than what you're giving it unless there is a problem with your CPU, in which case you will get crashes anyway.

 

yes i agree! Chances are that there will be no problem if it was fine with 4 h orthos + 2 gaming but i increased voltage just to be extra safe!

and btw.. its not that likely to play games for more than 6+ hours

 

After getting a BSOD from undervolting too low on my 11x multiplier, any sign of still having a 11x multiplier is gone from RMclock. The highest is 10x. Can anyone help with this? Much appreciated.

 

Here are a couple of pics that hopefully make it clearer. I have tried a uninstall and reboot, still no luck, apart from being able to increase the 10x voltage from 1.175 to 1.275.

 

are u sure it was 11 multiplier..?

run orthos to fully stress ur CPU and check the core speed(RMclock closed)..Is it lower than it used to be? if its fine maybe u need to unistall and reinstall RMclock..

 

Im positive there was a 11 multiplier before the BSOD.
I ran orthos, I hope this is what you wanted me to check?
CPU: 2001MHz FSB: 200MHz [200MHz x 10.0 est.]
My CPU usage widget is definitely showing more CPU activity.
Thanks for the reply so far

 

So if ur CPU is 2001MHz when stretched i think u are ok, since u have a 2Ghz CPU..

Before the BSOD ur speed was 2 200Ghz ?

i think u r confused with something..don't know what

Check here

ur T7250 is @ 200/2000 MHz with 10 multiplier..

u r welcome

 

OK thanks for the link, that made me feel a bit better. I'm still not sure why my 11x multiplier has disappeared as in the 2nd pic? And I've noticed on the CPU info page in RMark, CPU0 is listed as having a max multiplier of 11x, while CPU1 is 10x.

 

OK after running orthos for a few mins my CPU temps went up to 72c... And that was on 10x at 1.175v

 

This is a superb guide, flipfire, many thanks. I freely admit I still don't understand a few of the intricacies of it all.

With your help I've been able to take my first stab at undervolting with my X9100. This CPU seems to run extremely hot anyway, judging from my experiences and other people's stories about overheating in games. I don't use any kind of cooler, but even short periods of stresstesting with Ortho send my ACPI temps rocketing through the ceiling, hitting 105C+ on stock voltages in under a minute. So I'm in a situation where rather than decreasing my max temps for convenience's sake, I'm just trying to achieve the bare minimum of preventing critical overheating...

As such I'm unable to perform the rigorous stresstesting you recommend in your guide (because I have to intervene manually and stop Ortho for fear of my lappy melting). As a stab in the dark I went and undervolted the 11x multiplier from 1.2V to 1.1V. In terms of temperature, the results were immediately noticeable: it now takes something like 3 minutes to hit 105C as opposed to 60 seconds.

However I'm already noticing that the 'throttle' in CPU Info is falling short of the core clock; the CPU is throttling just shy of 3.0GHz, while the core clock is just above 3.1GHz. Does this mean that even a decrease of 0.1V is too much for this processor? Is it likely to produce instability? As I say, I'm unable to stress test for long periods because of the inevitability of overheating-related freeze-ups. I just want to see how far I can undervolt my maximum FID before I have to resort to underclocking to reduce heat.

What do you, flipfire, or any other experts, advise?

EDIT: figured out that the discrepancy with the throttle is probably the result of rmclock not using half multipliers. Still, does anyone know how much it's stable to undervolt an X9100 by?

 

There's really no voltage that's "dangerously" low as long as you test it before you tell RMclock to run at startup and apply the voltages (otherwise you'll have to start in safe mode and disable RMclock). But you may want to try crystalcpuid instead anyways since you have a .5 multiplier chip and are giving up some speed. Worst thing that will happen with a low voltage is your computer will lock up requiring a reboot. I was able to lower my voltage .275 volts on my T3200. 105C seems extremely high, i know that cpu is pretty high powered, but 105C is the absolute maximum rated temp for that CPU from intel...