The "Undervolting" Guide

Why do you need to set the multiplier ?

The multiplier is gonna be controlled via speedstep. Even if you change the multiplier with CCPUID, it might not stick with that setting and will again drop down to the minimum.

You know the lowest VID via RMClock, you just need to find the stable VID for the highest multiplier.

Run CPU-Z v1.41, Orthos and CCPUID. Monitor the Voltage change in CPU-Z, run orthos small FFTs (it'll automatically stress the highest 12.5x multiplier), and keep going down the VIDs slowly in CCPUID.
If you don't get it, I'll make a video of it.

 

Thanks. I thought I had to change the multiplier to assign a voltage to it. What you said works -- I managed to get the 12.5x multiplier down to 1.150V (at 1.138 it bluescreens). It seems to scale the lower multipliers automatically because when I then turned Orthos off, it also bluescreened. I will experiment some more later.

Unfortunately, I'm not seeing the radical improvements mentioned in this thread. The temperature when running Orthos without any modifications is 65-66C. The temperature when running at 1.150 is 61-62C. I guess my T9300 isn't one of the CPUs that gets a lot more energy that it needs by default.

 

Thanks to everyone for their help on this forum I was able to take my CPU from an absolute max of 87 C down to 69 C.
Volts down from 1.2250v on max multiplier to 1.0250. And from 1.050v on 6x multiplier to .8500v

That's a full 18 C cooler and this is without my homemade cooler.
http://s453.photobucket.com/albums/qq252/scourge18a/?action=view&current=Cooleropen2.jpg
The only thing I dont like is not being able to use half multipliers as mine is 11.5 on the X9100.
Thanks Everyone

 

Hi! This is the first time I've undervolted. And I'm wondering why most people can set there VID very low(others can go at .950V on their T5550). Because RMClock will only allow my T5550 to undervolt as low as 1.0500V and as high as 1.2000V(Default) on all multipliers. Is there something wrong with my RMClock?

Btw, my T5550 is detected as T5600 on my CPUID Hardware Monitor. Is that ok?

I've tried to back-read but browsing 226 pages is just like dying.

 

So I finally got around to undervolting my HP dv5t. Seems to be working well, temps down from 84C to about 74C under Orthos stress test. I'm checking the battery now, and it seems to be performing well (under power saver mode, used about 40% in an hour under constant use of internet). I've used the following voltages:

SuperLFM (6 x) .925
1 - 6x: .9625
2 - 7x: .9875
3 - 8x: 1.0125
4 - 9x: 1.0250

I have a P8600 processor. I've seen everyone else get the SuperLFM down to .9v, but mine won't go under .925. Also, under CPU info, it shows my model as a Core 2 Duo, but shows 'Unknown' under core and revision fields. It's that ok?

Anyone have anything different or anything else I should try? See my laptop specs in my sig. Thanks

 

That's normal, Intel locks the voltages differently for batches of CPUs (based on what voltages they need to pass their stress test), you just happened to get one not from the best batch.

That's "normal", it won't have any effect on the UVing even though RMClock doesn't know what model/rev it is.

 

So I got a crappy processor? Nice to know Intel doesn't follow any standards.

 

0.025V is not gonna make a difference.

Try getting the lowest possible voltage at the highest multiplier, because undervolting is primarily done to reduce load temps, so that one can reduce fan noise, even when hammering all cores at 100%.

 

That's not necessarily true. What if the max voltage for the min multiplier was locked at 1V? Then yours wouldn't seem so bad, but you make a big deal that you didn't get the absolute best of the bin. Don't worry about it, .025V won't make more than a minute or two for battery life.

 

Hello, newbie here, I'm about to buy a HP HDX18, probably with a QX9300 "extreme" quad processor. I have some questions about undervolting this processor, perhaps in particular in this application in this propriatary/branded HP configuration. Most of my questions though deal with undervolting "extreme" Intel processors in general though so if you have experience with that you'd be able to likely help me even if you're not familiar with the HDX18. Here's a cross-post from the "HDX18 owner's lounge":

Comments? Thanks!

 

Got it. Thanks, man. Too bad RMClock isn't being supported anymore. I suppose doing this every reboot isn't that big a deal, but I'd love not to have to do a workaround...

 

Has anyone elses CPU temps been slowly rising?

My CPU temps before undervolting were 71 for both cores. After undervolting, I had 61,63 after playing tf2 for an hour. But now, the temps have gone up to 65,68.....so it's slowly catching up to the pre-undervolting temps...

 

Does RMClock completely override Vista's power plan settings, or does it just override the CPU part of it? Will I be able to control other settings with the power plan settings?

 

How much time has passed since you undervolted? You still need to worry about the effects of dust and the ambient temperature. Different video card drivers also seem to play a role.

 

Does anyone know what "CPU core overheat detected" means? Are my processors broken?

Dell XPS 1530
Intel® Core™ 2 Duo CPU T5750 @ 2.00GHz
Installed Physical Memory (RAM) 3.00 GB
NVIDIA GeForce 8400M GS
Microsoft® Windows Vista™ Home Premium

I also have a cooling pad.

 

RMclock keeps switching my profile to "No management" whenever I start up. Is there anyway to have it switch to "Performance on demand" by default?

 

This is the window you want.

 

Yeh, just realised about the second drop-down box before I saw this post

 

Yay! I got this to work finally. I found it was not detecting my standard voltages (and did not change even when I went through the procedure outlined). All I had to do was press the "Defaults" button on the Profiles page, and it filled them out properly.
I have managed to undervolt to the lowest possible voltage of 0.9500v on a T5500 (saving 18c!!! at full load). Should I then just lock the CPU to the highest multiplier? This is only of course if the testing comes out clear (so far a hour with no problems). Does speedstep do anything else apart from change voltages/multipliers as necessary?

 

I got my T5500 down to 0.8875V at the highest multiplier. I used nhc though. It has worked great for the past 8 months. Older meroms rocks.

 

this was awesome!

can i undervolt my gpu

 

do i need to keep rightmark running?

 

On my T8300 i got it down to this:

6x 0.9500V
7x 0.9500V
8x 0.9500V
9x 0.9500V
10x 0.9500V
11x 0.9500V
12x 0.9875V

didn't do SuperLFM or IDA cause when i did a few weeks ago it just messed it all up and would give me BSOD's until i raised the voltage on everything.

 

which version of nhc did you use?
in my nhc i am unable to change voltages they are all blank instead

 

I used RMClock, NHC doesn't seem to like my puter (keeps locking up on stabilty tests)

I've got a weird problem know though - my laptop seems to throttle the clock to 1ghz from 1.6ghz as soon as I run on battery power. This is pointless now that the voltages are the same on 1.6ghz as they are on 1ghz.
No matter what I do (change power profiles, unistall the Vaio power control software, even messed about with the powercfg utility). There is no setting in the Bios either to disable this behaviour.
The only thing which seems to have some effect is to disable thermal monitor 1 and 2 (Which I am loath to do as I understand it is a protective measure), but this has the strange effect of increasing CPU load to add up to 100% (or at least making RMClock report this).

 

Anybody know if there is a quad core based Orthos? because i'm running this thing with HWmonitor and it's only showing that 2 of my cores are being tested. how good is that for me? thank you...and btw this guide is pretty bad @ss, especially the guide to use rmclock to "locking the cpu to full throttle". +rep

 

Use Prime95 instead.

 

i keep getting BSOD with prime95, but it does run all 4 cores...hmmm

 

okay well i guess it works just fine if i use the blend test.

 

Use Intel Burn Test.

 

Anyone have any luck with AMD? I tried the search function but I guess the string has to be more then 3 characters because nothing shows up and I don't have time to read through 228 pages unfortunately. I'm specifically interested in the AMD Turion(TM) X2 Dual-Core Mobile Processor RM-70. I appreciate any help.

 

While I'm here, anyone have any experience undervolting an Intel ULV cpu, specifically, the U7600, I have one on the way. Thanks

 

hi, i have tried to undervolt my T5800 Toshiba Notebook to 1.05V, however voltage in CPU-Z still displays voltages higher than the maximum voltage in the max multiplier, is the RM 2.35 Clock working or should i tried another program like CCPUID or some other suggestions?

I am using Vista 64 and have applied the x64 driver for RM

 

great job! This has helped out a lot

 

help! I accidently modified the no management settings, i have tried running restarting, uninstalling and wiping the registry, but the settings i accidently applied are still the same... It always opens altered, not like it does in the tutorial....

 

I have a new Vaio VGN-Z11 that I am trying to undervolt when I get to:

"ii) Untick "Auto Adjust intermediate-states VID" near the bottom and hit the Default button. Your factory voltages should now show up. Click Apply."

I can't see thge voltages even after a restart. Is that because sony have their own power managment stuff running?

Has anyone found a workaround?

Thanks for the great guide!

Alex

 

Alright I checked a few pages...couldn't find it. My processor is a p8400. It won't let me check Intel Dynamic Acceleration(IDA). This is right after I DL'd it. Could it be the CPU info? It doesn't specify it is a p8400...just an Intel Core 2 Duo. I am a n00b and tired...does this mean anything? Do I just have to manually max it when I am gonna be gaming

 

Hi,

I have a HP DV4 with a p8400 processor.

I ran the stress test along with Hwmonitor, and the highest temperature my CPu reacher was 58/59 degrees. Do you think it is worth me going through the trouble of undervolting?

Is there anyway that I could cool down my GPU (Nvidia 9200 GS), which reached 73 degress while the stress test was running?

 

I have to ask, is it unusual to be able to undervolt to the lowest voltage on some of the smaller multipliers? I'm at index 3 at my minimum voltage (.9000). If this is the case, would this mean that indexes 0-2 would work at the minimum voltage as well?

 

Your temps look fine, no need to undervolt.

No its normal. Its also normal to have all the multipliers to run on the lowest minimum voltage.

To answer your question yes. The lower the multiplier the less voltage it uses. So if index 3 is already on .9v then any index lower will run at that voltage or lower.

 

Thank you so much flipfire. I was able to get so much of an improvement with this guide! Now, lets see if this will actually give my HDX16t some decent battery life! (then again, every minute counts )

 

Hey, I have basically everything the same as you except mine laptop's a VAIO. I undervolted to 1.05v in RMCLock for all multipliers (6x-10x). However, in CPU-Z it still says 1.16v when CPU is idle and jumps to 1.36v when CPU is under load. I think CPU-Z is the one that is wrong here tho because running Orthos with the undervolt resulted in a 13 degrees celcius decrease in my CPU temperature. If CPU-Z was right and the voltage had not changed, then the temperature shouldn't decrease at all.

Question to Flipfire:
HWMonitor shows a much higher CPU temperature than RMClock shows. Which is the correct temperature? Before the underclock, HWMonitor showed a maximum temperature of 91 degrees!! OMG? Whereas RMClock something in the low 70s. Now after the undervolt (to 1.05v), HWMonitor shows a maximum of 78 degrees (still kinda high compared to what people are posting here) whereas RMClock says something in the 50s. So? Which is the correct one? Any ideas?

 

What CPU? Some require an offset because of the incorrect Tjunction. I suggest you use CoreTemp to tripple check.

Btw, you need to use CPU-z 1.44 as stated in the guide to show correct voltages. CPU-z removed the support for SLFM and correct notebook voltages for some reason on newer versions.

 

RMclock utility doesnt even give me option below 1.0625v and if I try 12* @ 1.0625v its an instant black screen scenario

I have to run 12* @ 1.1625v so how you got you'r below 1v I'll never know lol.

however I know for afact I can get 6* alot lower than its current setting is there a way to manual insert a voltage setting into the list?

 

Is there any way to make it so that RMclock does not take over for your laptop's battery moniter? I like being able to change my settings using Windows...

EDIT: may have been a freak instance...restarted and teh battery icon is back

 

Ok, just ran CoreTemp and it appears that the lower temperature is the correct one. I also want to know if it's possible to go lower than 1.050v because if 10x works perfectly at 1.050v then slower speeds should work with even lower voltages.

 

i have a gateway 7811 with a p8400 and haven't done a uv because of the 8.5 multiplier that only shows 8.0 (that means my cpu would downclock about 100mhz) ...
can anyone do a tutorial with Crystal CPUID or be willing to to help my with it? (i believe it was mentioned that cpuid shows half multipliers preventing the 100mhz downclock)
Thanks ^^

 

Ok
I have a IBM T61 - T7250

It has been overheating like crazy with temps running in the 90s before crashing! I got a fan which helped some but not alot

anyways I got rmclock and Although it was kinda hard to understand I am currently running it on the following settings

6x - 1.0125
and on up in increments to
10x -1.2875

My originals were:
6x - 1.2375
on up to
10x ->1.3875

my computer is SO much cooler now running around 56-58c

now here is my question.

My laptop is 2.00 GHz....I am now showing it running at .80 GHz. Is this it doing a throttle thing to where it will increase if needed or is this set like this to keep it cool?

Is there a setting I should look at for it to run at its normal 2.00GHz but still be undervolted? Im not sure if i turned on an auto throttle or something like that.

It runs A LOT cooler but i obviously can tell a difference in 2.00GHz and .80 which it is running at now

Also...one other thing...on my laptop 1.0125 is the absolute lowest setting I could get it to go to. Ive seen multiple people say they are at like .9 and such...but it wont even let me go lower than 1.0125....am i missing something here too?

Thanks!

 

Have you selected the mobile option in the advanced CPU options tab?

 

What notebook? Did you tick the mobile option in Advanced CPU options and restart RMclock?

It seems to be showing the desktop voltages.

Yes it will throttle on demand. This is why we choose the performance on demand profile in RMclock. Test it if you like...

As for the lower votlages, did you tick the mobile option in Advanced CPU options and restart RMclock?