The "Undervolting" Guide

As I mentioned in my posts above, CPUGenie DOESN'T work for me. My original 9.5x VID is 1.075 and I set it to 0.975, yes it passes the CPUGenie test without any problems but when I run Orthos or any CPU burn-in test, the voltage still goes up to 1.075V which is very weird!

 

I also found that CPUGenie loses it's "grip" on your settings giving inevitable reversions.

 

Yeah, thanks for the confirmation. At least, it's not just me.

What software can we use then?

 

Use RMC. Don't get wrapped up about your voltage "score". Just lower it to a safe level and know that your CPU won't overheat when you put the pedal to the metal.

 

Well, as I've said I need RMC to work with half multipliers. Hope it's possible with a right "tweak". The registry tweak in the other thread by how1er seems to give my laptop BSODs with just 0.100 less from the defaul VID of my highest multiplier.

 

My tweak is repeated (for the last time ) a few pages back. You should be able to get your top speed regardless of what multiplier RMC thinks its at. Don't pay attention to your final voltage. Pay attention to your top temperature under load. That's the only REAL reason for undervolting. You'll get more battery life by turning off the display when you're daydreaming than by undervolting........

 

Is there anyway to lock the voltages in cpugenie?

 

my rightmark only allows me to lower my voltage to 0.900V. That is the lowest voltage in the dropbox... Is there any way to go lower than that?

also, 1 more question is that, do lower number multiplers almost always consume less voltage than the higher number? For example, I lowered my highest multipler, 9.0x, to 0.9125V. My 8.0x is by default 1.0875V. Can I just start testing my 8.0x at 0.9125V or do i have to start with 1.0875V?

thanks, any help is appreciated

 

This guide is too complicated for me. Especially the part where he did the undervolting and there was no pictures. I'm pretty stupid when it comes to type of stuff, i wish there was an easier guide for this. Also do you really have to stress test for 45 minutes every time?

 

Dude, this guide is VERY EASY seriously.

And yes, it's even recommended MORE THAN 45 minutes. Have patience dude!

 

First question: NO

Second question: YES, equal or less.

 

wait so, on the step where he says:
i) First, We are going to start lowering the highest multiplier's voltage which is the 11x multiplier for me.

-Most people should be able to lower it by at least .100v to begin with the initial testing then slowly decreasing it from there on

Do i start lowering all the checked normal volts on this picture, because he says nothing about where to lower or what to lower and has no picture. of that actual part.

 

YES, he does say where to lower the voltage INITIALLY, take a look what you quoted "First, We are going to start lowering the highest multiplier's voltage which is the 11x multiplier for me."..

RTFM.

 

well okay, so lower the ticked box that has 11x in the picture? What about the other ones with the 6x 7x 8x 9x 10? Would i eventually have to lower those too after i get a stable value for the higher multiplier?

 

If you want optimal performance, you may do so, but what is important is to undervolt at least the highest, lowest, and the SuperLFM (if you decide to use that), then that's basically it.

Seriously man, it's all written in the guide crystal clear.

 

can you show me a picture of your main profile page and hightlight what you have changed

 

Thank you for an excellent guide Flipfire!

A word of advice to those who have Clevo M***TU based machines: RMClock will override your Silent Mode CPU settings. That is; when you press the Silent Mode button the CPU fan will still go to minimum revolutions, but the CPU will not be locked to the lowest FID and VID (which is what Silent Mode normally does). This means that your CPU will most likely reach higher than normal temperatures. The only workaround I have found so far is to exit RMClock completely whenever I want to use Silent Mode.

 

How come there have have no VID's i'm not even sure if the programs detects my cpu. Cause according to this guide, i was supposed to make it mobile. But afterwards the image is what i have. Is that normal?

 

I just followed the undervolting tutorial and undervolted my Benq. my T7100 1.8ghz has 6.0x to 9.0x multipliers. After the undervolting process, I realize that both the lowest multipler, 6.0x, and the second highest multiplier, 8.0x, could be run under the same voltage, 0.9000V.(0.9000V is the lowest value in the dropbox in my RMClock, unfortunately, if there is a way to go even lower, please let me know) Does that mean the same amount of battery would be consumed if I run at either 6.0x or 8.0x multipler? If so, would the temperature be same/similiar for running at either multiplier?

The reason I'm asking is because I want to create a power saving profile, and if I could run at 8.0x multipler for the same amount of battery as 6.0x, then why wouldn't I

thank you, any help is appreciated

 

Please use thumbnails. Your artwork makes people scroll to Tokyo to finish a sentence.

 

Unfortunately, it has not been explained adequately that while undervolting does lower excessive CPU temperatures and can extend battery life a little bit, reducing the CPU speed saves nothing. Running a program or application at half speed simply takes twice as long. The energy savings is zero, zilch, nada. At idle or no load the only things using any apprecible energy are the HDD and the display.

Speedswitching and throttling are really last resort methods for an overheating CPU under serious load that can't be cooled any other way. Like in outer space or Los Angeles or something

 

Hey guys ... just wanted to note that CrystalCPUID did in fact work for me.

I was able to lower the max temps under load by about 10 degrees on my P7350, plus the max multiplier (7.5 = 2.0 Ghz) is running on 1.038V ... that's how low CrystalCPUID will allow me to go.
It's good though, and I was also able to undervolt my gpu.
Now the only thing remaining would be to buy some proper thermal paste and apply it to the necessary components as a replacement for the 'stock paste' that isn't such a good insulator against heat.

 

Nice guide, I UVed my T3400, 10C temperature drop (13x multiplier at 1,065V, I havent tried lower values, maybe tomorrow). Thanks


To Deks:

I see that you have UVed your 9600M GT. I want to do that too with my 9500M GS (to decrease temperature). Please help me how, Is there any guide?

 

Actually there is ...
It's primarily for overclocking but same method can be used to undervolt the gpu.
Right now I'm at the school and am doing some reading so I cannot provide the needed link ... I'll do it once I get home.

 

Quick question i'm using a 7805u running a intel P8400 cpu, and it's max multiple is only 8x, but for some reason before i even started to undervolt the lower multiples(6x and 7x) has the same 1.2V as the 8x. I now have it at 1v and will probably go lower later but since they were all the same, can i untick 6x and 7x?

Also would undervolting too much lose performance? Some people with the P8400 have gotten it to 0.97v or lower and someone even got it to the lowest possible voltage without it crashing.

 

You really don't understand the concept of undervolting. Please read more and more and MORE!


@Deks

How did you able to do it with Crystal CPUID? I want to use that for my half multipliers but its GUI isn't as user-friendly as RMC.

 

Actually I find CrystalCPUID a tad simpler compared to RM Clock.

Opet up CrystalCPUID
Click on 'File' and then on 'Multiplier management setting'

Click on 'Enable voltages' and begin adjusting them to desired ones ... once you're done, click on 'Apply' and 'Ok'.
Also in the main window of CristalCPUID that opens up ... click on 'Function' and tick 'Multiplier Management'.
Leave CrystalCPUID running so each voltage will be automatically applied to your multiplier without forcing your single highest multiplier to be activated at all times.


Try to see what's the lowest possible voltage for your lowest multiplier and work from there.
Use ORTHOS to test out the settings, and also, use CPU-Z to confirm if the multipliers have changed their stock voltages to your custom ones.

j m

Here's the guide to overclocking the gpu:
http://www.laptopvideo2go.com/forum/index.php?showtopic=22286

Instructions are identical for undervolting the gpu ... the only thing you actually have to do is just change the voltages and not your clock speeds.

Also be advised that this involves flashing your bios, and that when you do so, in the command line in DOS mode, sometimes it's necessary to input the following command:
nvflash -4 -5 -6 xxx.rom (xxx being the name of your modified gpu bios)

without -4 -5 -6, I got an error and couldn't flash the bios, (you on the other hand might not need to put that in ... only do so if you see that you cannot flash the bios without that added line).

 

In the Multiplier Management Setting page, why are there only three FIDs there? Maximum, Middle, and Minimum. So this means that CrystalCPU can only undervolt three FIDs? Did you leave the other settings in this page to their default values?

What do you exactly mean when you said this: "Leave CrystalCPUID running so each voltage will be automatically applied to your multiplier without forcing your single highest multiplier to be activated at all times." ?

 

many thanks Deks, I would try it.
And can you tell me, please, how much GPU undervolting decreases GPU temperature?
I would be grateful for at least 5°C in idle and burn.

 

It's likely that CrystalCPUID is able to affect only 3 FIDs ... but then again, you don't need more than three really.

All other values are at their defaults.
As for leaving the program running ... I meant that in a way so you don't use Intel Enhanced SpeedStep Control in the 'function' menu because if you do, it will lock the cpu to a specific multiplier and voltage (lets say max if you modified only that multiplier) and won't automatically throttle down to a lower frequency when not in use.

I honestly don't know how much the gpu undervolting decreases temps.
MY guess is up to 5 degrees most likely ... perhaps more.
Depends on your laptop and cooling system.

 

I read somewhere that if you go under 1v you might get a higher risk of having issues with your CPU, is that true? Cause I'm currently at 1v for my highest multiplier.

 

Lol, where did you get that info.

 

A different thread about undervolting

 

Yeah, it might stop working

 

Today I put my CPU (t3400 2,16Ghz) 13x multiplier voltage to 1,025V (default is 1,2125V and yesterday I tested 1,0625V) and it works great


And last question for Deks

I see, that you have undervolted your graphic card (9600 GT) to 0,89V. Tell me, pls, what is your default voltage for that geforce.

thanks

 

I know that the P9500 just uses 25W as opposed to 35W, does that mean it is already "pre" undervolted? Because its default VID is 1.075 and I can only set it as low as 1.0125 before a BSOD occurs.

 

Quick Question: Does CPUID automatically keep those voltages at reboot or do you have to do something else for it do to so?

 

The program retains the voltages after the reboot ... you just have to activate the program manually (at least I haven't figured out how to autostart it with windows) and press F3 after opening CrystalCPUID main window.

 

Easy. Get free start manager prog. from Cuper Utilities. Use CrystalCPUID to generate a command line icon on your desktop with the setup you want. Install the command line into your startup programs with StartMgr.

Example: "C:\Program Files\Crystal\CrystalCPUID.exe" /F9 /V16 /P1 /E gives me 10.5X at 1.025 volts.

 

Guess what Kev? Intel and notebook mfrs. have taken note of the outrage about overheating and have tightened up the stock voltage range on newer processors. What used to be as wide as a barn door has been narrowed down, safely. Anything you can do with Orthos can be duplicated by a highly paid army of Ph.D. electrical engineers. You won't have as much fun but at least they did address the issue.

 

Have a question about CPUID: On my P7350, the lowest voltage it can set it to is 1.113 from an original of 1.250.

Everything runs fine at 1.113v so I suspect that I can probably undervolt even more with no problems but CPUID doesn't give me the option to. The lower voltages all have an x next to it and I get select them. Anyone know how to bypass this?

Oh and for undervolting at boot, I just created a new task in task scheduler to run at boot with /CQ /HIDE which starts multiplier management and then puts the program in the system tray thing.

 

Did you select Mobile CPU Type in Advanced CPU settings/ Intel Core 2 family advanced features?

 

No....I did not. Thanks and will try it out tonight

 

So, in short, I'm on the right track? That undervolted voltage is just normal for my processor?

 

Undervolting is, and will always be, case by case and CPU by CPU. Never mind what voltages other CPUs (and their owners!) get. Your notebook setup is unique. Do the best you can with the cards you've been dealt.

 

Alright then, well at least after undervolting my CPU to the max potential I noticed a 12 degress drop on my GPU temp when running Furmark

Before undervolting, I'm getting 93 max for Furmark which is pretty normal but now 81..

 

When RMClock is running according to the guide in this thread, are the Windows Vista power plans still effective as is?

 

Nice results. That's all there is. Now you can leave your rig on the highest FID and use it as the tool that it is.

 

running my qx9300 @ 2.93 ghz at

6.0 1.0500
.. ..
9.0 1.0500
10.0 1.0625
11.0 1.1000

at idle with no external cooling it runs 30-35c (with full fans just for kicks it ran 25 c)
stressed with no ext. cooling (100% cpu) it runs 68-72 c (with full fans 59 c)

So far so good

 

Quick question. I only see 0-5 on the indexes with 6,6,7,8,and then 9 times multipliers. Why dont i have a 12X multiplier like everyone else? Im using a p8600 processor.