The "Undervolting" Guide

Ok,I just reinstalled Vista, and dunno why,RMClock will not start with the computer bootup, neither by startup folder nor registry key.
I don`t remember what I did last time to make it work, so any sugestions would be great.

 

Wipe out the settings with the reg key and try again.

 

Thanks! When my machine comes, I'll get to work!

 

Somehow,now it works. Vista issues,lol.

 

I think it's the issue between the chair and keyboard.

 

You mean this ?
Probably right

 

Those who have done undervolting, did you fiddle with all the voltages corresponding to different multipliers? Or did you give up after doing one or two?

Also, I usually don't run resource-intensive programs. Would I benefit much if I only undervolted the top multiplier's voltage?

 

@ Xeci: It all depends if you use the processor at a higher multiplier or not. If by default you run at (for example) 12x, even when just browsing, you benifit from it. But when you run at 6x by default you won't gain anything from lowering the 12x voltage, you need to lower the 6x voltage to gain anything.


Now my own problem:
I have an Asus M51SN with a T8300 processor. If I select mobile in the advanced cpu settings I get different voltages to choose from then when I select auto-detect which puts it on desktop. The desktop voltages are the same as CPU-Z detects and when I put it on mobile cpu-z detects the voltages from when I would select desktop.

For example, when I select the lowest setting possible (1.0375v when in desktop and 0.9250v when in mobile) CPU-Z keeps saying 1.0375v.

So I guess I need to select desktop instead of mobile?

And another thing, when in desktop mode (which I presume is the correct mode) I can't lower the voltage more then 1.0375v while I believe I could easily lower it to around 1v for the 6x multiplier. The 12x doesn't go below 1.0500 but the others, in particular the 6x multiplier, should be able to go below 1.0375v don't you think?

These are the default voltages together with my current voltages.
http://i51.photobucket.com/albums/f379/Tsurany/naamloos-1.jpg

Edit: CPU-Z 1.4 says other voltages then cpu-z 1.45. Which one should I believe?

 

Undervolting is majorly beneficial when the CPU is in load. Mainly because the highest multiplier's voltage gets dropped the most. It is still beneficial for everyday notebook use though.

When you open a program it will usually go from idle to full speed. It will only use the middle multipliers on certain cpu loads (eg. virus scanning)

Hi

Please select Mobile mode > Apply and restart RMclock.

Any version after CPU-z v1.41 will show incorrect voltages (desktop). Its a known issue as discussed previously.

 

Well that means i'm currently running at 0,9375 with my T8400 (also confimed by other program, so indeed cpu 1.41 is correct and 1.45 is wrong). Lowest I can go is 0,9250. Is there any way to get even lower? Since RMClock doesn't have any lower settings, but i'm sure at 6x it should get a bit lower even.

 

On the "CPU Info" page, I can't get the current "Req.Vcore (VID) to go below 1.00V even though my highest multiplier voltage is set to 0.9625V. Could you tell me what I'm doing wrong?

And should I tick the options on the "Advanced CPU settings" page as shown on the front page?

 

No, thats the lowest Penryns go.

Yes follow exactly whats on the first page to detect the proper default voltages.

What processor do you have?

 

I have T9300.

 

Changing those settings did the trick. I've been running ORTHOS for over 30 mins at 1.00V, which is 0.1375V off the highest multiplier. I think that's the best my CPU can do. The voltage setting below that gave me a restart. In terms of the temp, it shaved off nearly 15C: it hit 64C when running ORTHOS for 10 mins, and now it's hovering at 50C. Thank you for the great guide!

By the way, for the rest of the multipliers, can I use the Auto-adjust?

 

Yes you can just use auto-adjust but i cant guarantee that it will be 100% stable. Thats why i recommend to test every multiplier. Try it out after youve confirmed the highest multiplier to be fully stable.

I suggest you keep a slight voltage margin from your unstable voltages (1 step up). This will make sure its 110% stable. Raising the voltage by 1 step wont make much of a difference on temps and battery savings anyway, it will just increase the stability and reliability.

 

Just breaking in my T8330 and AS5 some more, with CPU and GPU stressed to the max, my CPU tops out at 62C and my GPU maxes at 60C.
T8300
x6-x10: .95V
x11: .975V
x12: 1.025V
Just wish it had a lower SLFM voltage, would be nice to get it to idle under 40C. BTW, what's the lowest voltage someone's got for Penryn? .85V?

 

flipfire: thank you for the advice and thank you again for the great guide!
repped!

 

I applied AS5 recently too, my CPU tops out at exactly 62c and my gpu (oc'd) to 72c. Hoping it will improve overtime, im only like 15 hours into the 200 hour break-in period.

The lowest voltage for Penryns is .925v as far as i know. Only the T7500 seems to be able to reach .850v.

With .850v SLFM, AS5 and cooling pad, my processor idles a 32-34c

 

Yep,the T7500 can go down to to 0.85 V
Mine idles at 33-35C , but without a cooling pad (600 Mhz)

 

Thnx for the advice

 

Somehow my CPU never enter in SuperFLM..

 

Can you guys recommend me a good power consumption monitor? I would like to do official benchmarks on power consumption and battery savings. It has to be accurate

My old school compaq M2000 is getting a Pentium M 725 (1.6ghz) upgrade from a Celeron M. From what i read, Pentium M's can possibly be undervolted down to .940v for the highest multiplier with an idle of .700v

This will be my test dummy

Make sure the boxes for superlfm is ticked in the subprofile page > Apply. Your CPU should be using SuperLFM instead of the normal idle

 

Yep, it's ticked alright but still idle at 6x 1.2ghz. Doesn't matter if I leave it at 8x by default or change it to 6x.
Note: It's a new config, wipe out the settings before reconfig.

 

8x will make it idle at 800mhz. 6x will idle at 600mhz. Im not sure why its not working for you. you might have overlooked something small

 

Yeah well, I guess I can live without it

 

Post a screenie of the settings screen , profiles and performance on demand, I think I might have an idea about this.

 

Ok I'm really stupid. Making you screenshots, I saw that in performence-on-demand FLT is not ticked. But IT WAS! I'M SURE. It's working now.
Btw is this was the idea? Making screens so I can see if something is wrong?

 

No,posting them here so we can figure it out.
Tick only the SLFM and the multiplier you want(6x in both cases).
I run it like that on battery,and my system managed 2 h yesterday at full brigthness with a 45W hungry GPU

 

Power on demand is so usefull, even with the plug in it it's running at 600mhz until I start Team Fortress 2, then it goes up to 2400mhz of pure flesh eating powaaaaah!

 

Hi everyone!

So I followed all the directions and was able to lower the voltage on all indexes by quite a bit. With RM running I am noticing interesting CPU activity under load: my laptop per its spec has an AMD turion X2 64 bit, 1.81 Ghz. The RM is showing .80Ghz used but often times it goes up to 1.0 or 1.4ghz. It does not seem to go to 1.8ghz.. is something wrong? I do not notice any slowness or delay and it seems to be running just fine but these numbers are confusing me!

Another interesting piece of data is that when I lowered my max index (9) voltage, I was able to achieve a lower max temperature, on both cores, by 140 degrees C. The results of my first test were C1 206c and C2 206c. The second test resulted in C1 66c and C2 56c. I have heard of temperature drops but not this drastic.

 

206c??? I don't think that's a right reading.

66c and 56c are much more normal to me.

 

Yeah, 206ºC is impossible alright

 

By the way, for your CPU speed/usage, have you tried running ORTHOS? If you can see it goes up to 1.8, then your CPU is working normally.

 

I thought 206 was high as well.. Heres a screen shot from a few minutes ago.

http://i46.photobucket.com/albums/f146/s8d6/1.jpg

I ran ortho for 5 minutes. The CPU sped is still showing as 1.41 GHZ.. I wonder why?

 

lol dayum...

Must be a glitch in the temp sensor, cannot be 206c for real, stuff would start to melt...

For your CPU speed, I think you forgot to go back to the sub-profile setting and re-tick the boxes for your multipliers after you test the lower multipliers.

 

Doh!

I had them checked within profile but not within performance on demand. It gets to 1.81 now

My cpu temps seem a tad lower... should I "guess and check" lower the temps for all multipliers to the minimum voltage I can get without crashing them to reduce the temp even more?

 

Try not to guess. If you don't want to test all of them one by one, then just test the lowest and highest multipliers, then let RM "Auto-adjust intermediate states VIDs". I learned this from John, works great.

http://forum.notebookreview.com/showpost.php?p=3192338&postcount=34

 

From min to max my voltages are all set to 1.000 now. The core temps (ignoring the max) are now 65 and 54, what do you think, livable? I have the most heat issues with my GPU getting to around 96 degrees C under heavy load (nvidia 6510 go) but was hoping reducing the voltage to the cpu would cool the laptop as a whole.

 

All set to 1.0000V? Your lowest multiplier cannot go lower than 1.0000V?

Clear HWMonitor: View -> Clear Min/Max

Then run ORTHOS for 10 mins, what is the max temp with the new setting?

 

Heres the results from the min set to .95v and all others disabled:

http://i46.photobucket.com/albums/f146/s8d6/111.jpg

 

That's better.
Although, Orthos should be run for half hour or so for safety.
206C, I still can't believe that HWMonitor screwed up that bad.
What did RMClock show then? cause it has a built in monitor also...

 

I wish I had it open! I believe around 60 ish... the max temp on hwmonitor was hopefully just acting funky. So to test it for 30-45 minutes should I re-check all of the index values?

 

Heres the result after 30 minutes:

http://i46.photobucket.com/albums/f146/s8d6/222.jpg

I sort of forgot the first time's results as the hwmonitor was being odd.. hopefully this is decently cool?

 

There we go, much better now.
All you have to do is test all the multipliers now for like half hour and you got the CPU undervolted all the way

 

so do i, i don't even see settings below .95v. what settings work for you?

 

thanks for the guide
just under volted my computer today. one weird thing is that i did not get any bsod or errors on orfus (ran the 30-45 minute tests then 90-120 minute tests on the higher speeds). I stopped at certain voltages i felt comfortable with but I will try to lower my 11x and 12x again when i have more time.


here's my results on a t9300 2.5ghz penryn

what do you guys think? too low?

6x 0.9500 (no option for lower voltage)
7x 0.9500
8x 0.9500
9x 0.9625
10x 0.9625
11x 1.0000
12x 1.0125 (from 1.1325) max temp 63/64 (from 73/74)

 

also, is it recommended to run vista battery saver and rmcpu clock?

thanks

 

mine were similar
6x = .95
7x = .95
8x = .95
9x = .95
10x = .95
11x = .975
12x = 1.025 (from 1.1375)

max temp 73 -> 64/65
i'm happy with 6-11 but why is my 12x so high?? the guide says i should get about .15 and i can't even get that...

and why can't we go lower than .95 as its obvious that we should for our lower multipliers...

 

same chip? t9300?

 

yes 2.5 ghz core 2 duo t9300
penryn