The "Undervolting" Guide

Is RMClockLauncher.exe in your list of boot-time startup progs?

Oh Gawd, a horrible after-dinner thought: Have you turned off all spyware, malware and firewall progss first. RMC reaches deep into Window's 'family jewels" to accomplish it's goals in the registry. Next, are you installing with full admin. authority ? Let me know the outcome.

 

when undervoliting do i lower the temp on all the boxes 1-6 or just the highest one?

 

here is my screen were should i start just check them all down 1 by one?

 

go to page 1 and read the first post.

 

Anyone undervolt t9400 yet, and what were the specs u ended up using, specifically for dv5t.

 

Only lower and test the voltages you're going to use in the day-to-day operation of your rig. Uncheck the boxes you're not going to use. I don't need a six speed transmission in my car or in my computer. In fact, I use only the top speed (12X), undervolted of course, all the time. Heat is only really based on load and idle is idle no matter what GHz you're at.

Heat=Watts=Load X Speed. On AC or battery, top speed costs nothing if you're processing nothing.

 

I checked in msconfig and RMClockLauncher.exe is in the start up. I can verify that anyways cause it does load up on startup.

I didn't turn off my avast antivirus or windows firewall when i installed it since the directions didn't say so.

It's weird though, if i unplug it and have it run off battery, the processor will use a max voltage of 1.250 volts when used normally. If I start to run orthos with a cpu intensive test, the max voltage used is only 1.05 volts, which is what I tweaked it to.

 

Hey "zero7404" i did read the first page like 5 times it does not state what box to undervolt and what not to! i just want to reduce some heat some box # 6 im guessing ? thx icecubez189

 

bump* someone plz help me thx

 

I give up. Anybody else?

 

Just check them all and adjust voltage down and test/use the darn thing.

 

@ icecubez189
Were you refering to power spikes like in below screen.

Scott could be referring to Power Options > RMClock Power Management. You can find it as in below screen shot.

 

you read it 5 times, you say ? it's the section called "Setting up profile" and it's under item 3iii. read it again.

 

oy, that screen shot was a great help. I thought RMClock would automatically insert itself into the power plan but I saw in your screenshot exactly where it was. I went back to my window, noticed a "show additional power plans" tab on the bottom, clicked it and voila, RMClock Power Management was there.

I was monitoring the current usage through the cpu info tab for VID. Unfortunately, even ticking the RMClock Power Management and then unplugging the AC Adapter, I still jump up to a max of 1.250 volts!!! I honeslty don't know what else I can do. I followed the instructions right down to the bone. Maybe I need to restart my laptop with RMClock P.M. checked. If that doesn't work, i'll redo the steps again. If that doesn't work then w/e. At least it half works! Thanks for your help! You too scott.ager!

 

I was just reading the guide.. and i did my first 10 minute test... *see attached screenshot*. - has not undervolted yet.

Are these temps good , or will i see more improvements if i undervolt my cpu? Right now I haven't undervolted cpu yet.

edit: and i kept reading and... rm clock doesn't work for t9500?

 

I have successfully undervolted T7500 on hp 8510p, according to this great manual... Mine CPUs are stable on 0.9875V- good result...
Just one question rmclock in cpu info meni shows uncorrect values for current minimal and maximal, I think...
He again sees 1.2125V for 11 multiplier, although I cut it to 0.9875V... Can somebody explain that to me, please...

 

you will always see improvements if you undervolt.

install rmclock (it takes almost literally 10 seconds) and see if it works. it doesnt necessarily have to recognize your processor correctly; it thought mine was a desktop processor, changed it to mobile and everything else worked fine for me.

 

Hundreds of people habe been asking this question:
"Is there a way to undervolt my new Intel Mobile CPU below 0,9x Volt?"
Earlier in 2008 I develpoed a theoretical pinmod concept.
By controlling one pin of the CPU with software (e.g.VID0) we may be able to overrule VID5 or VID4.

Example - connect VID0 and VID5 with a switch and a small resistor:
VID5 VID4 VID3 VID2 VID1 VID0 Voltage (modded)
0 0 1 1 0 0 1,35
1 0 1 1 0 1 0,9375
0 0 1 1 1 0 1,325
1 0 1 1 1 1 0,9125
0 1 0 0 0 0 1,3
1 1 0 0 0 1 0,8875
0 1 0 0 1 0 1,275
1 1 0 0 1 1 0,8625
0 1 0 1 0 0 1,25
1 1 0 1 0 1 0,8375
0 1 0 1 1 0 1,225
1 1 0 1 1 1 0,8125
0 1 1 0 0 0 1,2
1 1 1 0 0 1 0,7875
0 1 1 0 1 0 1,175
1 1 1 0 1 1 0,7625
0 1 1 1 0 0 1,15
1 1 1 1 0 1 0,7375
0 1 1 1 1 0 1,125
1 1 1 1 1 1 0,7125

There may be some risk in connecting two VIDs, but I
think I will take this risk with my next Latitude E6500 as
the CPU is easily accessable and small vero-wire will help me.
http://support.euro.dell.com/support/edocs/systems/late6500/en/sm/html/cpu.htm#wp1179976
I want to additionaly insert the very small isolated vero-wire into the socked (unisolated at the end) and connect the other ends to a switch and a small resistor.

At my actual older notebook (D830) the CPU is not easy to access.
So I am desperatly waiting for the delivery of my E6500.

Would anyone like to be part of the research team and like to share
the honor of success and the risk of the experiment?
But please do not connect a VID pin to GND or VCC directly as this
can lead into a direct shortcut. An VID-interconnection has a good
chance for a success.

A VID spreadsheet (Thanks to evilr00t). Dynamic VID-VID pinmod version (only supports connecting pairs of pins together)
http://www.xtremesystems.org/forums/showpost.php?p=2613532&postcount=24

The VID1/VID4 connection:
new / old voltage
0,8875 1,0875
1,0750 1,0750
0,8625 1,0625
1,0500 1,0500
0,8375 1,0375
1,0250 1,0250
0,8125 1,0125
1,0000 1,0000
0,7875 0,9875
0,9750 0,9750
0,7625 0,9625
0,9500 0,9500
0,7375 0,9375
0,9250 0,9250
0,7125 0,9125
Here you have the complete range between 0,7125 and 1,0750 mapped to the range of 0,9125 to 1,0875.
[img=http://img257.imageshack.us/img257/310/dynamicvoltmod2vt2.jpg - 716x547, 32,9Kb - 716x547, 32,9Kb - 716x547, 32,9Kb]http://img257.imageshack.us/img257/310/dynamicvoltmod2vt2.jpg[/img]

More information on this theoretical pinmod concept:
http://forum.rightmark.org/topic.cgi?id=6:1455-2


Any additional idea at this point?

 

Thanks for this terrific guide...

Undervolted this new gateway 6862 with t5750 to 1.0 on all 6-12 and went from max temps of mid 80's to mid 60's.

Just for kicks after a few hours of testing I turned off the settings except for the 6 and 12 and it seems I have noticed a performance gain. Am I imagining things?

Thanks again folks..

 

I have a T5750 in my Fujitsu A6120. I set 12X at 0.9625 volts and unchecked everthing else. Idleing at 6X or 12X is almost identical in wattage and heat, so why bother having two speeds. No savings.

 

I followed your thread in the rightmark forum few months back. Very interesting indeed.

Do you know of anyone who actually tried undervolting via pinmod (voltmod)? I mean someone who have succeded or even failled doing it?

And check this out. It's a thread I started not long ago. I want to try the voltmod (not with a resistance, wire only) but for the time been I've only one laptop and can't risk frying it.
http://forum.notebookreview.com/showthread.php?t=294785

 

I did pinmod to 1.4375v/1.3375v/1.1375v to get 3.6G/3.4G/2.8G, not UV though.

 

in your laptop you mean?

Did you take pictures? Can you if not much hassle describe who did you do it? what vid did you connect and did you connect it too?

 

yeah i did it in my M570RU with X9000. Actually i did direct connect all vids to vcc vss......

 

I searched a lot before creating this thread:
http://forum.notebookreview.com/showthread.php?t=294785

and it seems that everyone agrees about the following facts:
Vid = 0 to Vid = 1 ------- Vid pin need to be insolated or removed
Vid = 1 to Vid = 0 ------- Vid + Vss

What did you use Vcc for?

 

I use VCC to get: Vid = 0 to Vid = 1. I don´t want to destroy my cpu pin to get that 1.

But only a few voltage can be get, because in order to get vcc, u must at first connect vid0 to vcc.

I checked the vid table again, the only few voltage i can get is: 0.9125/0.9375, 1.1125/1.1375, 1.3125/1.3375, 1.4125/1.4375, 1.4875, 1.5000.

 

For example if u want to get 0.9375v (1 0 1 1 0 1 0), i think u should connect the vids like so:

 

me neither this why I'm asking.

In lot of threads they say that it's risky to connect a Vid to Vcc. So I'm amazed that it actualy works

I don't undestand this bit. Do you mean that this are the only voltages you have (can access too) after voltmod?

What happens to the rest of the available optiond?

 

OK so you went from the default 1.275v ( 0 0 1 0 0 1 0) to 1.3375v ( 0 0 0 1 1 0 1).

Doing so removes every voltage but these: 0.9125/0.9375, 1.1125/1.1375, 1.3125/1.3375, 1.4125/1.4375, 1.4875, 1.5000.
Right?

So volmoding doesn't only increase/descrease the voltage, it also reduce the range of available voltages?
Right?

and the below post is wrong
http://forum.notebookreview.com/showpost.php?p=3878245&postcount=22
Right?

 

There are the only voltages i can access, for example u cannot just only get vid5 to 1 (1.1000v) without vid 0/2/3 connected to VCC. The VCC pin is too far away from other vids.

 

I don´t know my default vcore. I saw different VIDs in different BIOS. Sometime is 1.2V, sometime is 1.0125V.

I don´t know that. After doing this i cannot read vcore via CPUZ etc. BUt i think it´s right.

 

Having a bit of a problem with RMClock forgetting my Profile Settings. Every time I boot I have to manually change the profile settings to Performance from none. Is there a way to fix this? I'm running Vista 64. Appreciate it.

 

did you go to "advanced CPU setting" then clicked apply this settings on startup?

 

Yes I have. Everything else is saved. I just have to change the profiles every time I boot for some weird reason.

 

I am getting BSOD's on Undervolting ..

also, i didnt notice any temp. drop.

 

If you had read the guide you would have read that if you go to far, you will have BSODs and how far down did you go?

 

Im having the same problem on Vista 32. Other than that, it works like a charm

 

You need to up the voltage a bit for the multiplier that is given you the BSOD..

 

thanks for confirming this. I guess D3X was wrong.

I found the info regarding your default Vcore from the net. 1.275v sounded correct since my T2500 (2ghz) at its max multiplier (12x) use a Vcore of 1.250v.

 

I think i found the correct defult VID of my X90: 1.2000v (0 1 1 0 0 0) (according to many software: Core temp, Everest etc. but not CPUZ). I connect VID4 to VSS and VID0 to VCC, so now (0 0 1 0 0 1) should be 1.3875v, at least @3.46G stable. So i think it´s correct. This time only 2 VIDs are modded, not all 7. If u can get the correct default VID i think it will save a lot of work.

 

well using this guide i was able to get my T5550 down to .95v and knock my "loaded" temps from 68-70 down to 55c

HOWEVER the "clock" program wont let me set anything lower than .95V

should i leave it alone or is there something else to try??

i am running it in the "on demand" mode and it seems to be working well with no BSODs even after 3 hours of stress testing

scott

 

Be sure you have entered a selection in the startup section.

 

Has there been any sure news on undervolting P-series processors yet?

Not that I'm worried about heat, lol. This thing idles at 29C and full load about 50C. It also returns back to idle temps very quickly after the load has been removed.

Gotta love excessively big cooling systems.

Greg

 

i have a p8600 and it works well. idle temps dont go down very much, but load temps are significantly lower

 

Yep, stupid me, that's what it was. Staring me right in the face and I kept missing it. D'oh! Thanks man

 

Thanks for the info.

Before you said that you had modified 3 Vids to get a higher voltage. Does going for 2 Vids such as above give a more extended range of Vcore compared to what you had below

I found it a bit odd that my T2500 @ 2ghz has a higher defaut Vcore than your X9000 @ 2.8ghz

 

I think it will be more available. The few voltages i post before are under condition that all 7 pins are modded.

 

I thought so, but I did not realise that you modded all you ViDs before.

My ViD comb. is 0 0 1 0 1 0 0 (1.25v) but I'm still not sure about connecting a ViD to a Vcc because of this:
http://translate.google.com/translate?u=http%3A%2F%2Fwww.meisterkuehler.de%2Fforum%2Fstromspar-und-messtechnik-allgemein%2F17249-vcore-mod-fuer-alle-intel-celeron-bis-quad-core-1-30v-0-880v.html&sl=de&tl=en&hl=en&ie=UTF-8

 

I know. Not all VCC are 3.3V, there´re some for CPU voltage. At least i havn´t damaged mine.