The "Undervolting" Guide

Thanks. Got it. So far, so good. Is there a way to slow down data polling ? It's chewing up a lot of CPU timeslices

Ooops. It reverted to default voltage after a few hours. Crap !

 

yes, I am, the one that flipfire is pointing to in the beginning

 

Actually, I took Flipfire's advice over a year ago. Drop it down to a BSOD and then nudge it back up one increment (0.025V. for me) and then go back to normal use. If it ever happens again, buck it up one more increment.

Result: No failures in over a year and no more than 15 minutes of my time wasted on Orthos. If you have OCD, you may enjoy running benchmarks all day long. I don't.

 

IDK....maybe my laptop was just funky, but I went two increments up, tested, no BSOD with Orthos after that first one, still did it to me a few days later.

!Ibrahim~

 

You keep bumping it up until no more BSODs. Tthere's no single correct answer. The very worst you can do is stock voltage. If it BSODs there, better find your warranty card.

 

Haha, yeah.

I had a GPU do that to me once when I was overclocking; put it back to stock and it still artifacted...thankfully, it was XFX so they sent me another one.

~Ibrahim~

 

The lowest i can set the voltage on my T5250 is 0.95v. Why can't i set it any lower?? It hasn't bsod'ed at this voltage.

I did drop my load temps 18oC but i can't set my 6x multi any lower than the stock 0.95v. I have a feeling it could do lower if the option was available.

 

Intel locked the lowest voltage at 0.95V. I guess they don't trust you

18C is better than most.....

 

are u sure u switched it to mobile not desktop?

 

What about that Vista permission (UAC) stuff I read about here. Chumley and others have posted ways to make RMC load from the registry, like it needs to, without prompting.

 

i'd very much like to know if the rmclock vista 64 shall work on win7 64 too?

 

works for me

 

Hi everyone

I've got some issue with a SU3500 (on a Acer 3810T)
I tried the whole undervolting procedure under win7 x64 AND the vista x32 but when I check the voltages with rmclock or cpuz, I get 0.900V.
The core vids seem to be stuck at 0.900V... It's bit weird especially when it's working on some other laptop with the same cpu... I don't get it
Has anyone got the same problem here ?

 

i got everything perfect and works but when im on battery there are like spikes... i mean it will go to the default voltage and then apply the voltage i applied for that multiplier. but as the muliplier changes i see spikes in the voltages going up to 1.230 and then down to my 0.987... this only happend when in battery... when im plugged in always the voltages i applied will remain unchanged running windows 7 64 bits... any idea?? THANKS!

 

Posters here have reported that W7 overpowers RMC for control of power settings. I'm not using W7 or even Vista so I can't give an itemized list of to-do's. But, it seems to me that if you want undervolting and clock control via RMC, you'll have to have W7 let go of things. For example, are W7 power options set to RMC control? What settings are different for line vs. battery in W7 and RMC? I'm guessing that you might have selected some battery options in W7 that conflict with RMC.

 

thanks for the answer! yeah but the thing is that it used to work. besides... for example.. the profiles remain the same for battery or AC. i mean. high performance. battery saver. blalanced.. theres no high performance for battery and high performance fot AC... so the question is... why in when in battery it doesnt work. i mean it works. but i see this spikes in voltages that i didnt used to... i tried wiping out.. changing settings. checking and unchecking boxes... nothing... problems is on battery only... any more ideas =/

 

In your W7 power options you should be selecting RMClock control only, for both. That's what RMC does on first install. Then, in RMC, you can individually cherry-pick FIDs, VIDs, screen off, HDD off, and standby.

 

Thanks for the reply! scott! ok i have tried the rmclock power plan. havent got a chance to test it i batttery but i will soon.. but now that im using this powerplan i get ramdom freezed screens... and i read something in event viewer about kernel power. system crash or system lost power. so the thing is... i can be playing. all day and it wouldn't freeze but when im doing ramdom things no processor either gpu intensive. like chatting. copying stuff from one place to another. i get this freezing. even the clock stops. so maybe something todo with lower multipliers and too low voltage? or voltage problems only show up as Blue screens? thanks in advance!

 

with the new ultraslims with good battery and 33%OC button - the asus ULxxVT's, could the cpu take being undervolted (for temp/battery life on the go), but when plugged in Overclocked? Just wanna know if I can get the best of both worlds, expanding battery life even more when I'm out, and getting more power when I'm in and the battery means little

 

If your built-in system sets the OC voltage, then no. But, if the OC just bumps the clock speed, then you can use RMC to set lower voltages across the board. Just remember that the higher the clock speed, the higher the voltage has to be to force a full "bucket" of electrons to the next gate on time before the signal changes.

 

Try bumping up the voltage, one step at a time, until your computer stops acting like a jerk.

Remember, set the Windows power plan to RMC. Then, inside RMC, define your custom plan (and name it that, too).

 

thanks man... but just tried... theres just no way i tried different combinations... setting power plan to rmclock. and customizing in rmclock. setting perfomance and then selecting performance in rmclock. wiped out everything. reset power plans in windows... theres no way it will keep my voltages while on battery... the most stable plan is power saver in which it would not spike voltages that much... and again. while in AC everything is perfect doesnt matter what power plan is active... i would like it to be otherwise u know cause i could really use the low voltages while in battery. for battery life. fan noise. temps... gosh... any other ideas?! thanks in advance n_n!

 

Is there any way to Undervolt a Pentium M?

 

awesome stuff. WILL TRY IT!!!

 

Yes they are still by far the best undervolters.

Mine runs so cool that the fans dont even turn on at all.

 

What a fun Snipe Hunt

OK, what devices (besides CPUs) have power controls built into their own hardware but not covered by RMC ?. These come to mind: GPU, USB, LAN, Wireless!, Audio, 1394, maybe more. I've made adjustments to these in Device Manager Properties before, but for other reasons. See if there's a conflict by disabling the devices one at a time (except your display !) and looking for the spike anomalies.

 

ok... im gonna try it on an old dv1000, that overheats + shuts off.

only thing is, it has no cpu temp sensor... so this'l be a little more interesting lol

 

Yeah PM's have no thermal sensor so you rely on the ACPI temps.

 

Ahh ok. Duh

I should be trying in It the next couple days

 

I am trying to use RMCLOCk on windows 7 x64. I installed it and copied/replace the vistax64 thing. Anyways, I cannot restart/close rmclock. I have to use task manger and find rmclock.exe and end it. Any ideas why?

 

Try running it in administrator mode

 

I'm already overclocking my computer for gaming purposes. Do I have to base what I do for undervolting off of what I do when I overclock or does that have nothing to do with it?

Just wanna make sure everything runs smooth for when I play my games.

 

And by the way I'm only overclocking my GPU... not my CPU if it makes any difference.

 

I would say undervolting is simmilar to overclocking, but probably a bit more safe.

So yeah, you can base what you do for undervolting off of what you do when you overclock.

 

CPU and GPU have separate power management. It doesnt affect what you do with the other.

 

What ???

This is really going to confuse people who want to know the fundamentals.

 

But Infinity29 is already overclocking his GPU, I assume he must know the basics.

There are some differences, but I do really think undervolting and overclocking are simmilar.

Take baby steps and monitor temps and stability.

 

Well, now I really have to ask why you think that lowering the operating voltage of a transistor gate and changing the rate at which the gate is opened and closed are even remotely connected. Both UV and OC are aimed at getting more for less, but not in a similar way. Faster processing is actually less efficient because heat production climbs as the square of the over-volting usually required for over-clocking.

 

i'll be doing this soon, thank you so much!

 

My laptop has a P8700 2.53Ghz Core 2 Duo, but on battery, the cpu will not go above 1684 Mhz even under the ORTHOS cpu stress test. My profile for battery is on performance under demand, and I have all the multipliers checked for 6x to 9x (my max below IDA). Anybody know why this is the issue?

 

Flipfire,

So I don't have to worry about basing my undervolting off of my GPU overclocking?

Its only if I were to overclock my CPU right?

 

Which windows power plan are you using? Ive seen this happen quite frequently, its usually because another power plan is interfering with RMclock.

Undervolting your CPU will not affect your GPU. If you undervolt your GPU on the other hand then that will affect its stability.

 

Profile, if you're using RMClock, should ALWAYS be RMClock. Try changing that.

And, half-multi CPUs (like yours) require IDA to be "on" to get that extra multiplier.

~Ibrahim~

 

I was trying to say that the procedure is similar, not the end result.

 

Well, is the guide you put up for undervolting your CPU or your GPU? or is it for both?

 

Only for CPU.

 

good stuff flipfire u got some stuff i didn't really know how to properly use in RMclock so thanks!.

RMclock always seem to have so many other features i don't quite see you using. Mostly 'advanced cpu settings' and 'management' - enable OS power management integration.

Wouldn't we normally turn that last one off?

 

I've messed with all of my power options, setting CPU minimum and maximum to 100, and my CPU stays capped at 1.684 Ghz and a multiplier of 6 with a 1.000V even though my x6 multiplier is at 0.875V

 

After doing my stress test I got a max core temp of 56 degrees. Is this normal? Seems like I should be getting a higher temp

 

What CPU is it? What multiplier and voltage? I mean, one at a low clock and low voltage could quite possibly only hit 56C, especially with good cooling.

~Ibrahim~