The "Undervolting" Guide

Have you selected "performance on demand" on all? AC Power: "current" "startup" and Battery: "current" "startup" ? It should be there on all 4 profile selections.

And under "settings" under startup options tick run at windows startup and hit apply.

Those are the only needed! If that doesn't work just re-read the guide and check what's missing

 

sorry to be a bit lazy, but 200+ pages of comments pheweeee. ive tried to follow the instructionson the first page on my Acer 5315, and cant seem to adjust the voltages of the stock M550 celeron. is this not possible on single core processors??

 

It should be possible, but you should only have one multiplier to change voltage on, as celerons don't have speedstep.

 

worked like a charm
i only had performance on demand selected under 'current'.
thanks again!

edit:
got another question, what does this do?

 

what processors get underclocked by doing this (i know that the p8400 does by like ~100 mhz)?

And idle temps are not affected at ALL?

 

No problem, glad to help

IDA is when the CPU is disabling one core so it becomes a single core and then uses the 10x multiplier to get a higher clock speed, this can be used when an application is very needy of a single threaded CPU. It's a cool feature. Though it's useless.

Those CPU's who has ,5x multipliers. Like 8,5x 9,5x 10,5x and so on. As RMClock will only use whole multipliers like 8,9,10,11,12 and so on.


And no idle temps aren't affected at all, no need either. A cpu is already running at the lowest possible voltage(and speed) when idle.

And idle temps are useless to know anyhow, loadtemps is everything that's important. Because nothing overheats or is near to overheat @ idle.

 

I noticed in task manager that increased throttling raises the ticks of the RMClock process at the expense of the system idle process. Is this just swapping one make work for another. Exactly what does system idle process do anyway?

 

Increased throttling? What do you mean? How did you do that?

System idle process always takes up lots, but in fact it doesnt take up anything it just looks like that. Google for a more specific answer and what it's for.

 

thanks again.
but you should still undervolt the lower multipliers right? gives you more battery life since the cpe would spend most of it's time in idle.

 

Yes, you're correct.


When i reffered to idle in my previous post i meant really idle, as when it uses the lowest multiplier All other multipliers where voltage can be adjusted, go ahead and undevolt as it will give you a longer batterylife as you say

 

The definitions are explained in the guide near the bottom.

Turn on SuperLFM if you want a better idle, set it to 6x multiplier and choose the lowest voltage possible.

SuperLFM will cut the FSB in half when idle.

 

Have we had any closure on whether to use the traditional method (as outlined here) or using two multipliers - SuperFLM on the highest FID and lowest VID, and the max multiplier on the highest FID and lowest stable VID.

 

Does undervolting with RMclock override the settings in Vista's power options? I want to know that when I use power saver, I am using a limited machine and on High Performance, it is at optimum.

 

hi, guys!

to longer my laptop battery life, i decided to untervolt.
my laptop is a fujitsu p8400 dual core 2.1ghz and has half multiplier.
max 8.5x
min 6.5x
so i have only 3options 6*/7*/8*
normal vid is 1.25v at 8x and 0.925v at 6x.
so i undervolted using rm clock to 0.95v with 8x. i tested 1hour orthos and there are no errors. but if i put 0.935 after 2min an error occurs. so i let it to 0.95v. consequences :max iddle temp was reduced to 5celcius .
but the problem is that the min multiplier (6x) is already set to 0.925v which is also the LFM. my voltage was blocked to that voltage so i used the registry hack to go even lower, but now even i set lower than 0.925v the vid doesnt go down. is the cpu voltage blocked by the manufacturer or is there anyway to fix it? i really need to lower it cause there is no difference in my battery life as its only 1hour. and as i can see how low i undervolted with 8x i guess i could go maybe 1volt lower with 6 multiplier.

 

Welcome to the forum.

Nope, Intel locks the minimum voltage (AMD doesn't AFAIK) that their CPUs can use, both for stability and so they can overprice the crap out of those that can use less power.

A couple months ago, there was some talk about pin-modding the newer Intel CPUs to have them use less voltage, but it never came to anything.

 

I have a question. I undervolted successfully but got a BSOD. Everything is stable now, it's just that I got a BSOD. I did not loose any data or anything. I am just worried that a BSOD is bad for my computer.

What does anyone think?

 

Some of the people here might have already seen this but there is a way to undervolt puma and it works for both 64 and 32-bit

instructions are in this sister forum

http://forum.tabletpcreview.com/showthread.php?t=21877

i just posted this because i was looking for a way to undervolt my tx2500z and i stumbled upon this and i think its worth sharing

 

Hmm why am I losing core speed?

 

your proc has a clock multiplier of 9.5, rmclock only support integer multipliers, so it's running at 266*9=2.4 instead of 266*9.5=2.53

 

Get CPUGENIE. It`s much better then RMClock and it supports half multipliers. Only thing is that it cost money.

 

But even CPU-Z shows my processor running at a multiplier of 9.0. I've seen it at 9.5 before.

 

Ok I don't think I'm doing this right...I got my 6.0 multiplier running at the lowest possible voltage but my temperatures have not gone down at all. The profiles are saved and the icons are in my taskbar. What's the deal?

 

Ok, what should i do if after your step of reducing the Voltage by .1v if i can't go down by another .025 since the software will only go down by another .0125... :/
Edit: Also would doing the "Performance on Demand" from startup be a good idea for me to do?

 

RMClock works very well with my T61p.

Here is a screen shot of my T61p undervolted with a large number of CPU and GPU loads trying to beat* it down.

Click on image to see high resolution.

 

Why on earth would you underclock?

 

Its max temps that undervotling will lower. Intel has locked the minimum voltage so you cant really do much.

.0125 + .0125 = .025 (2 steps)

Yes putting PoD on startup is fine.

Save battery, i lock mine to 800mhz when i use my notebook as a netbook.

 

I have a question. I undervolted successfully but got a BSOD. Everything is stable now, it's just that I got a BSOD. I did not loose any data or anything. I am just worried that a BSOD is bad for my computer. What do you think?

 

Ive BSOD my testbook about 1000 times by now from experimental stuff. Its a 3 year old compaq and still running strong. I think ive proven its not gonna wreck your hardware. Not once have i gotten a complaint of hardware damage from this guide.

But if you BSOD while running a critical system process (like backing up) then it might corrupt your OS. It rarely happens thats why I recommend you close all other programs when testing.

 

1. Reduce overall load on machine.
2. Longer battery life during mobile operations.
3. Lower heat. My [email protected] idles@ 25 degrees celsius.
4. Because I can.

At 1.6 GHZ the T9300 works great in my T61p.
This also allows me to increase GPU core speeds becuase there is less heat and power loss related to CPU.

 

Ok here's my current voltage thing. This is the attachment. It's my current voltage things after i clicked the down by .1v.

 

BSOD itself just means that something software has gone in a direction it wasn't supposed to.
Now if you get BSODs after overclocking and jacking the voltage up you may be getting them because the hardware is frying, but the BSOD is caused by hardware or software issues, not the other way around.

BSOD can be very bad for the OS, but it in itself won't harm hardware.

 

My T61p with T9300 underclocked to 1.6GHZ and undervolted to .9 volts.Orthos after an hour running temperature during full load 32 degrees celsius. Used RMClock.

 

BSOD problem during undervolting would more than likely only be software related. Worst case would probably be system restore for the OS with the aid of a "bootable OS restore" disk.

 

OK, just a quick fly by -

Fast and dirty on the new machine in my sig (P8600):

RMClock picked up the full load VID as 1.3125V while CPU-Z read it as 1.250V.

Since my machine earlier passed 12hrs Orthos right out of the box, I simply initially set max VID at -100mV (1.2125V) for 15 mins, and then jumped down to - 150mV (1.1625V) for another 5 mins, and then went to -162.5mV (for an even VID of 1.1500V), where it's been running for >1h20m.

This was just supposed to be just a quick proof-of-concept trial-run, for me, ATM.

But,

I lost ~8 - 10*C (via core temp) off my earlier full load Orthos Tmax!

And this on already very cool stock running 25W TDP 45nM high-K gate P8600.

Not sure if I'll leave it as is, or go more exhaustive.

Thank you, Flip.

+rep

EDIT - re: rep ... Oops...no can do, ATM.

 

Go for more, it can't hurt. Lower the voltage, better the temperature and battery life! Worst that can happen is a BSOD, but at least you know how much your voltages can go down too. Your proccessor should be able to go down a bit more.

Good luck!

 

I very likely will (continue testing the bottom).

I'm an experienced desktop overclocker (via the BIOS) but wasn't even aware RMClock worked reliably. My previous experiences with s/w OCing tools (incl RMClk) on desktops weren't the best. So I just jumped in w/o reading anything much except how to use the GUI, to see if it worked.

Think I'll scope out the thread and OP sticky a bit, now.

*subscribes*

 

Well, quite honestly, I'm pretty blown away by this:



I just simply dropped VID to 1.1250V & lit off OCCT to run small_data_sets. Nearly an hour later I'm rewarded with stability + OCCT full load temps of 43*C!

[in 21*C (69*F) indoor ambient room temps]

This is all getting pretty sick.

I'm hooked.

Definitely more to come as time permits...

+++

I'd like to get one of these 25W mobile Penryns in a proper desktop enthusiast grade mobo under my DIY H2O Swiftech cooling. I smell an easy 50%+ OC!

 

ok to just be sure here i have to have RM clock running for this to stay happening? Or does RM clock actually do something to the CPU itself thats' permanent like what OCing software does.

 

Hi everybody, some days ago I undervolted my laptop (hp 8710w) and I have some questions to ask.

As you can see in the screenshot I attached, cpu-z and core-temp show 2.4 ghz cpu speed, but orthos shows 2.5 ghz. Why this happens ?

My other question is why cpu-z shows vid 1.113 but core-temp and rmclock (it's not shown in the screenshot) show vid 1 ?

I assume that because the rmclock doesn't support a 12.5x multiplier option my cpu (t9300 @ 2.5 ghz) is now underclocked to 2.4 ghz.
Am I wrong?
Should I change something?

 

^ I kinda have a similar question.

Found these quotes in an old thread...what do I do in this situation with my setup? Apparently for the m1530 t9300 2.5Ghz it doesn't work properly?

 

do p9500s lose ~100mhz? im not sure if the multipliers are .5 or not.

 

RMClock needs to be running for any changes to take place. As soon as RMClock is killed the Vcore returns to normal.

As for OCing s/w that does something "permanent", I've never seen any apps of that sort, save for proprietary BIOS' s/w that accesses the BIOS settings thru a Windows GUI.

 

I don't think I am doing anything wrong BUT

RM clock does not detect my CPU? My previous laptop used RM clock though...

 

Yes the P9500 use a half multiplier (9.5x)

Kamusta

Ano ba ang CPU mo?

 

Masaya sympre dahil bago laptop ko hahahah

My CPU still cannot be read by RM clock... I was thinking since RM clock was not updated for nearly a year now that they don't know new CPUs???

Kung mod nagbreak ng forum rules sino magdedelete ng post mo?(If a moderator broke the rules who deletes your posts?)

 

thanks for this - i have shaved off 12C from doing this and have gained 15-20mins battery life!

fattail95

 

Can anybody please answer to my question? post #2489

 

CPU-Z and coretemp are correct, Orthos is assuming that you're at the highest multiplier possible because it doesn't check the actual multiplier in use. Lots of Core architecture CPUs have this problem when being overclocked at lower multipliers than default as well. If you check the IDA box on your RM Clock screen though you may get your 12.5x back, as well as enabling the IDA 13x multiplier? But yes your CPU at least at the moment is stuck at 2.4ghz. Also CPU-Z is probably reporting the rated voltage of the chip where as the others are reporting the real voltage in use, you can usually tell by the temps if it's undervolting correctly.

 

Thank you very much my friend for your answer.
With undervolting the cpu temperature has dropped by 12-14c and my laptop now is completely silent in full load so it doesn't matter very much if the cpu is a little bit underclocked.
Should I also check the ''auto-adjust intermediate states vids'' in rmclock?

 

No, you want to lock the multipliers by unchecking all but one selection of multiplier and VID and test the VID settings manually for each one and then assign them, otherwise RMclock just guesses at what the inbetween voltages should be (usually once you get a multiplier or 2 below max you can set the VID to the lowest possible setting for the rest since the range is pretty limited)