Simple Undervolting Tutorial - Pentium M Dothan - Page 26

Edit: Damn it, I managed to post in the wrong thread. Sorry about that, I haven't had much sleep the last couple of nights.

Aren't all Pentium M's, at the moment, Dothans?

Tried it on my Dothan 760, worked perfectly:
800MHz - .700v (Prime stable 3hrs+, stopped after that)
2.0GHz - 1.1v (Prime stable 9hrs+, could go lower but I need the extra stability for school)

What do you guys use to measure temps?

Also to note a few things have changed on the most recent edition of RM Clock, took me a bit but I figured it out. I'll be glad to write an update if you guys want it

Measuring temps is easy with Centrino Hardware Control--it sits at the tray so you'll know instantly when something's wrong and the temperature shoots up.

yeah that's a nice feature, I9KFanGUI has it too...

For some reason the "Torture Test" option is grey'ed out and therefore I can't run it, on my Prime95 program...anyone know why this is?

thanks for the reply tar_heel_guy.. my buddy actually sent me version 1.4 of rmclock, which is working for me, but i may experiment with 1.6 more when i have time..

oh you're certainly welcome... hope it works well for you...

btw, just to let you know, ver1.6 is much more stable... i couldn't even use the monitoring tab in the earlier ver...

hmm, ive set up voltage for my multipliers, when I run prime at 100 percent load with rmclock i'll get 45 degrees, when I exit out of rmclock while still running prime95 my temp drops to 39 ish degrees. Shouldn't it be cooler with rm clock? On max load (15 for multiplier) its set to 1.100v. Anyone know whats going on?

You have to select "just stress testing" when you install it. Now it thinks your participating in the GIMPS search for prime numbers , re-install it my friend.

Using rmclock, counter strike source stress test is 76 fps, without it its 132 fps, maybe im doing something wrong but its better not to risk lower performance for alittle bit cooler cpu

I'm having the same problem as an earlier user where after running the torture test the CPU is still running at 50% speed, but it did run at 100% earlier. Someone mentioned not to select "Run HLT command when the system is idle", except I can't even find this on RMclock.

Although the percentages of CPU load is correct, because it goes up when I begin stress test, the speed maintains itself at half my cpu speed.

I apologize if someone already addressed this problem, but I find looking through 34 pages something very unlikely.

I have gotten my CPU down to min: 0.732v and max 1.004v!

I also noticed that some people use CHC and it looks much more user friendly than RMclock. Should I use this one and if I should, where can I find a tutorial for it?

A big thanks to anyone who can help me out, I really appreciate it.

Its really straightforward. I didn't need a guide. Just gradually drop your voltage to find the lowest stable one (or slightly higher than that).

That's sounds exactly like you're using an 800MHz CPU instead of its full clock, check your settings. You have to create a full-speed setting in the PST panel because the program itself only creates an 800MHz setting.

without a doubt it should, obviously something is not set properly...

might wann search the official RMClock thread.

a lotta people are havin' probs with RMClock... i believe that one of the reasons for this is that a new version has been released (v1.6) and the instructions for it are different...

the new version is much more solid (bug free) for the Pentium M in particular...

so if you're not runnin' the NEW version, i'd advise you to do so...

the only instructions i'm aware of on this site are for the OLD version, except for some of the posts in this thread...

hmm... I think there needs to be a a few things updated for 1.6v, here goes:

First off, go to the general tab and select whatever functions you want on the bottom, but make sure that you select "restore CPU defaults on exit" in case something messes up, then you can just exit . Then, under the management tab, select use p-state transition. In the white box right below that there should be two (you'll probably have to create at least one). The first should be State No. 0, with an FID of 5x (or whatever your lowest is) and a voltage of 0.998v (or w/e it is stock on your lap top). This is the 800MHz power saving setting for the new P-Ms. The other should be State No. 1, with your max FID (mine is 15x) and your stock full voltage (mine is 1.356v).
Make sure that your A/C adaptor is plugged in, then go down to AC profile and select "maximal" from the drop down box. Get Prime 95 started and calculating (Large FFTs work best for a test). Also make sure that you select "Use OS-based load management" (same as run HLT etc.). From here go back to your P state transitions box and click on the max setting (the one with your highest multiplier) and modify the voltage going to it. I took it down 3 steps at a time until I got to about 1.15 and then I went down one at a time from there. Make sure you hit apply on the bottom of the management tab after each voltage change. You can also use CPU-z to vertify the voltage change. If you're pin-modded you may need to stop sooner because your CPU will require more juice. Keep lowering it until you get an error, then raise it and prime test. Anything higher than 8 hours means you're rock solid. I got an instant error at 1.054, but I run 1.1v just for the extra stability (10hrs+ stable).
Once that has been tested, go back to the management tab and under AC profile select "minimal". This will use your 800MHz CPU (or whatever your lowest multi is) setting. The odd case here is that now you will load at this speed, which will never happen in "real-world," the CPU is only at 800MHz when it's idle. In the same way drop your voltage down (remember to hit apply). I think almost every CPU can do .75v, and most can do .700v, but test and test again. After that let prime95 run for 3 hours or so, which is more than enough because the CPU will never be loaded at this state.
Ta-da, you're done. Just make sure you go to management and select "Automatic Management" under your AC Profile. Also under you General tab select "state minimized" and "run automatically at start up," but make sure you keep "restore defaults upon exit" just in case something ever glitches on your. Have fun and rock on

oh i forgot to mention that some people are runnin' CHC, which is fine but understand that the GPU part of it is only for ATI cards NOT for the nVidia... so if you use it and have a nVidia card, only the fan control portion will work for you...

Read your mind Tar heel guy, see above