The "Undervolting" Guide

It goes away aslong as you dont have RMclock running.

 

Anybody been able to get this working on an HP DV5? Mine doesn't auto detect my CPU correctly, and grays out the core 2 duo options. The chipset is "unknown" in the chipset tab, though the CPU info tab is correct. Likely due to this problem, my voltages aren't correctly detected.

edit: think I got it working, anybody know approx. how much I can UV for a T5800 2.0 ghz? I went from 1.2500 to 1.2375 for max but obviously it can probably go lower.

 

Hello flipfire and everyone. Please I would like to know if it is safe/possible to undervolt a Core 2 Duo P9500 (2.53Ghz) in a laptop that just uses Windows XP Pro. I will follow every step on the amazing guide in the first post of this thread, but I have this doubt if I will get the same benefitial results using XP Pro. I will also use the 3 software programs found there unless there are newer/better versions (please let me know if there are).

Thank you

 

I am sorry but that is not correct. The x9000 works at 2.8, 3.0, 3.2, and 3.4 which correlates to the 14x, 15x, 16x, 17x multipliers. I have been using mine at 3.4 since I got it earlier this year. With the help of your guide I just got rmclock working with all of those multipliers and I am now undervolting. Thanks by the way, much appreciated!

 

Hi flipfire. Just read your tutorial. Neat stuff. I have a question though. I noticed in the Installing and setting up RMClock screenshot where it shows Advanced CPU settings, you have both Enable Thermal Monitor 1 and 2 checked. Is this by default? Mine were not checked when I first ran the program.

Should I check them because I notice a significant difference in temperature when both are checked. I also noticed that in the Monitoring page, the voltage is different from what was set in Profiles.

Will these settings make a difference when I am testing to find the optimum voltages?

Thanks in advance.

My XPS M1330 specs. are:

Intel Core 2 Duo T7250 2.0GHz | 3GB DDR2 SDRAM
128MB Nvidia GeForce 8400M GS | 320GB SATA
Windows Vista Home Premium SP1 | Ubuntu 8.04

 

Why my p8400 only has THREE multipliers (6X, 7X, and 8X), so few? I read some threads that show SIX or more multipliers?




Thanks

 

It should work, people with 2nd gen penryns are able to undervolt even if RMclock doesnt recognize the cpu fully.

OS wont matter, RMclock is actually natively made for XP 32/64bit

I guess the XPS Bios allows this, thanks for the info.

Yes it should be on by default, i suggest you enable it unless your having issues.

What CPU is this? Do you have IDA enabled?

The second generation penryns have higher FSB thats why it has less multipliers

So FSB x multiplier = clockspeed

Your CPU actually has an 8.5x multiplier but RMclock cannot recognize half multipliers. So that means it will use the 8x instead and downclock a little.

 

Thank you for your reply flipfire. And congratulations again for such a wonderful guide.

 

flipside,
thank you so much for your quick reply

 

Thanks for the reply. It's a Core 2 Duo T7250. I unchecked IDA in Advanced CPU Settings and Profiles. I'll post some screenshots soon.

 

I have a dv4 with the same T5800, and have successfully undervolted from 1.2500V on all multipliers (6x, 7x, 8x, 9x, 10x) to 1.0500V. Max temps dropped from ~79C to a whopping ~56C! No BSOD's, and for some reason, everything feels faster.

Only problem with the T5800 is I think it is too new of a CPU to be recognized by HWmonitor. The core1 and core2 temp's never change, however my THRM under ACPI seems to be the temperature of my CPU. (see attached screenshot)

Thanks flipfire for the wonderful guide!

 

I'm in the process of undervolting the T7400 in my 6214W: at stock the lowest multiplier (x6) was 1.0500V and the highest (x13) was 1.1850V.

I've just finished reducing the highest multiplier from 1.1850V to 1.0500V, and on load I've got a reduction of 14C. I'm now looking to find the VIDs for all lower multipliers, however I'm a bit confused about the lowest one.

Your guide says not to modify the lowest multiplier, so since my highest and lowest multipliers are now set to 1.0500V (and therefore all multipliers in between should be too), should I stop? Is there any reason why I shouldn't attempt to reduce the lowest multiplier, since the lowest limit is 0.9500V?

EDIT: Hmm when I exit RMClock, CPU-Z says that the voltage is 0.9500V when running at 6x multiplier, so I guess in RMClock I should set the lowest multiplier to 0.9500V and find the VIDs for the inbetween multipliers?

 

You can lower your idle 6x to the lowest voltage possible. Its supposed to be defaulted at the lowest voltage possible.

Heres what you do to automatically setup all your multipliers.
On the main profile page,
-Click Default
-Hit Apply
-Tick "Auto Adjust Intermediate VID"
-Select the lowest voltage possible for the idle (6x)
-Select 1.1850v for the 13x
-Click Apply

If done correctly all the multipliers in the middle will be filled in automatically.

You should also get a better idle and overall temperature

 

I have a problem. I run RMClock, but my AMD Athlon 2X Dual-Core QL-62 doesnt show up when i start it up... advanced CPU settings doesn't show up so i dno what to do...

 

when i try running rmclock on my AMD on dell, i see scattered horizontal lines going across the screen. i didnt even touch the voltages yet. what should i do? there were half multipliers all the way up to 13+ i think...

 

Dear FlipFire

I want to say : Thanks guy! Today...You're my Hero!! lool

I did your guid "STEP BY STEP" on DV4-1070EE , T9400 2.53GHz CPU.
Results?
Fantastic !!!
It is working on 2.39GHz and 20 (19 to 20) centigrade COOLER !!! without any Cooling Pad!

My settings :
9.0X 0.9750 v ,,,all others to 0.900 v,,
It is working fine till now.

Regards and thanks again My Dear Hero! lool

 

This is awesome but I just want to get something straight. I can make a profile for my on-the-go energy saver mode and switch back to the "No Management" profile for when I need my half multiplier back for RTS games right?

 

Can you see the multiplier and voltage controls? If these dont show up then your CPU is not supported.

This post might help. Which AMD processor is it?

Cool bananas.

Yes on the main profile page you can choose on the drop down box on which profile you wanna use for AC power and Battery.

 

Umm, I get an error message when I try to start RMC

"Cannot install or load RTCore64 driver."

Where can I find a signed driver because I'm pretty sure that that is causing this.

 

Its in the guide... just have a read again.

 

Ahh I see, sorry I didn't scroll down all the way

 

Hi, i've got an ASUS C90S and it runs some pretty high temps even when idle. Its got a desktop CPU, a Conroe E6700. Is it possible to use RMClock to undervolt it?

 

Yes im pretty sure someone has done it before.

Make sure you set RMclock to Desktop mode if its not Auto Detected.

Does the voltages show up in the profile page?

 

Thanks, I will try 1.0500 for my T5800 on my DV5.

 

I have this problem as well. Any solution?

May I add that I have also done the Wipeout registry file but the problem still remains.

 

Thanks a lot for the guide!!

I have been testing different values on my t9300. I wen't down to 0.9625v but Orthos started beeping and said that there was a fatal error. No BSOD yet. Right now I am trying with 0.9750v let's see if it is really stable.

My temps were not very high before this. I had a maximum of 60º with Orthos running for 15 minutes. Right now I am running at 48º with 2.5GHz!!

 

Thanks for the guide!

Under sustained heavy load I was getting ridiculous temperatures, 81C and 84C on cores 0 and 1. Now I undervolted from 1.225 all the way down to 1.000 and my temps under sustained heavy load are down to 65C and 68C, a 16 degree difference!

A little unnerving though about the discrepancy between the two cores, my core 1 is running significantly hotter.

 

Curious, I'm about to receive an Alienware M17. One of the first things I'd like to do with is undervolt it (for now). I plan on experimenting with overclocking later.

How dependent on voltage is overclocking? I understand undervolting is all advantage, but combining overclocking AND undervolting? Besides the stability issues to work out with programs like wPrime95 for testing, is there anything to be aware of when combining the two?

- F

 

It all depends upon how tolerant your CPU is. Every CPU is different, even if it is the same model, family, etc.

I have a T5200, and I can undervolt it to 0.9500V at the highest multiplier. So, my chip has a good voltage tolerance, considering the fact that even with a >40% overclock, I can still undervolt it to 1.0625V.

You won't really need to overvolt, unless you're aiming for a >50% OC, which is literally impossible in a notebook.

You'll just have to do the whole undervolting process again, when overclocked.

 

I don't believe this works with the T5250. I followed this guide and CPU-Z still shows 1.338v even though I set RMClock to 1.255

 

Try CPU-Z 1.41 or 1.40.5. The link will be in the guide.

 

Thanks to this guide I lowered the 100% load max-temperature on my T5550 in my Gateway P6860FX from 69C to 54C. Got all the voltages down to 0.9500V on all multipliers. Most of the time it runs in the high 30's to low 40's.

 

flipfire, thought about updating your original post with a link to Prime95 as an alternative to orthos? In my experience Prime95 with small FFTs generates more heat than Orthos.

 

From what I understand, Orthos uses prime95's code-base under the hood. It's merely an alternative interface slapped onto it solely for stress-testing purposes. Like prime95, Orthos can test using small/large FFTs or a blend of both.

 

I've got a problem with RMClock.

Some days ago I was able to lower my voltages quite a lot. My max voltage was set to 1.000v.

The problem is that right now RMClock doesn't apply the voltages that I have told it. On the CPUInfo tab it says "Maximal: 12.0x 1.1375V" when it should be 1.000v

I have tried creating a Power Saving profile with only one Multiplier but RMClock doesn't apply correctly the changes.

What can I do to fix this?

Thanks!

 

Dear FlipFire,,

As I mentioned before, I have done the job with XP and VISTA,,,,Same results and thanks again! but a question:

In XP Just before starting RMCLOCK (in start up phase of windows),,,brightness keys are working properly but after automatic starting of this program, I can not adjust the brightness of screen using FN + Brightness keys.

Any Idea?
Regards

 

thanks you so much !! I have stressed for 1 hour thats goos enough for me lost 10 degrees

 

Undervolting my P8600 is not worth the effort because I can't select any voltage below 1.035V, and the lowest multiplier is already set to that voltage by default. Even on the highest multiplier I can only get a savings of .0875V (1.2500V - 1.1625V). When taking into account the fact that the CPU rarely runs at the highest multiplier under normal conditions, it's just not worth the effort.

 

I'm trying to undervolt a friend's Hp Dv2000, when I run Orthos though, CPU 0 is always at 100% load, while CPU 1 runs between 90-100%. Is there anything I can do about this? Also, in the beginning of the guide it says:

What am I supposed to do with this? Where am I supposed to tick this aside from the normal places? Is there an extra box somewhere to tick on AMDs?

 

has anyone been able to successfully undervolt a P8400 or P8600 and does it even make a difference or is it not worth it at all for the newer cpus?

 

hi guys!

i've just finished undervolting my 2.0 Ghz T61 THINKPAD. I kinda feel that it's quite a bit faster and smoother and of course cooler.

settings:

6.0x = 0.8500
7.0x = 0.9000
8.0x = 0.9875
9.0x = 1.0000
10.0x = 1.1125

system's quite normal.

However, in the RightMark Advanced CPU settings, i don't get this part:

. Enable Enh. Deeper Sleep (C4E)
. Enable Hard C4E

these functions were unmarked in my settings.

What are they and will they affect the settings?


thanks

 

Those are CPU sleep states. C4 is related to reduced V cc.

Your CPU doesn't support those states, so they were unmarked as default.

 

thanks for this,
i managed to take off 15 degrees by taking off 0.2250V

 

it does. i just unmarked them myself!

SHOULD I RE-MARK THEM?????

 

The main problem with the P8x00 processors is that the lowest multiplier is already set to the lowest possible voltage. There's some room for improvement on the highest multiplier, but that's highly dependent on each individual processor. For example, I was only able to lower the voltage on the 9x multiplier for my P8600 by 0.0875V which is pretty insignificant in my opinion. It doesn't hurt to try, but your mileage may vary.

 

Your choice. Its not going to affect performance. The CPU sleeps when it is idle. If you're not clear regarding the sleep states, check out the description given on Intel's site.

 

Is there anyone qich are the consequences of disabling the "popup mode" option ?
I've unchecked it to prevent the "famous" hp whine but I don't know if doing so I "risk" anything...

 

Flipfire,
What a hoot my friend. This is grand stuff indeed, the rig is a (Product Red) T9300 with usual specs, great purchase @AUD2049 with all the addons ie DBVT card an' all. But have never been able to install SP1 (both Dell & MSFT have been of no assitance in this regard even with the Premiium Support,so I gave up). Hence, through some wheeling & dealing managed to get an x64 Ulimate install DVD @AUD249. From that learnt how to do drivers etc.
Whilst cruising for same came upon this thread, went to Umart, purchased a WD Black Scorpion 7200rm with 16mb cache (rig came with 200gb 7200), and now we are not cookin' so to speak!

 

my cpu is a p8400.
i noticed the multiplier is 8.0 in RMclock, but in actuality
it is 8.5.. am I going to lose performance or is it just saying that because
it doesnt recognize 8.5?

 

You are losing performance. RMClock does not recognize half-multipliers. When undervolted using RMClock, your CPU will have a max frequency of 2128MHz instead of 2261MHz.

You can try out CrystalCPUID, if the loss bothers you. I think it recognizes half-multipliers.