Acer Ferrari 4000 Undervolting ?

I would like to know this also, as I do not know how to undervolt

What is the purpose of undervolting? Reduce heat, increase battery?

Is this method is comparable with eManager's ePowerManagement ?

the Turion CPUs should undervolt very well. I bet that the 35W CPU can easily do 25W, if not <20W.

Just follow this guide, which has nice pics:

http://www.laptoplogic.com/resources/guides/38/1/1/

i looked at that guide, and my version of RMclock looks different than the one they use. Mine also has only 1 multiplier at 4x. any idea whats up. I would like to try and do this soon

what about the 4x multiplier? can you change that setting? and how do you get the computer to run at 100% load but only using he 4x multiplier and not 10x

i undervolted tonight. mine seems to be running fine at 1.325 and only stops prime95 about 1/4 of the time at 1.300. But i just gamed for about half an hour with it at 1.325 and mobile meter still says im running around 70 degrees. maybe the big gain is in battery life, but so far no lower temp

what is the point of undervolting when running on ac exept to make it run cooler, although it doesn't seem to make it run cooler. Undervolting doesn't take away from proccessor capabilty or how much data it can proccess right?

Can you actually see any improvement in temparatures and battery life with those small volt decreases? I mean - there seems to be a alot more room for volt decrease on pentium M's :http://www.notebookforums.com/showth...t=undervolting

I think I want to convert my HD to NTFS before I do any undervolting since system crashes are not nice on FAT32 systems. I once lost 80GB of files, that got converted to FILEXXX.CHK files by scandisk, due to a failed overclocking attempt.

Don't undervolt the 4x (800MHz) setting!

My system seems stable on AC/DC at

4x 0.975 V (standard 1.000V - decrease 2.5%) - also freezes sometimes
10x 1.375 V (standard 1.450V - decrease ~5%)

At 4x 0.925 V my system froze instantly and at 4x 0.950 V the system took hours of prime torture, but eventually frooze at the most inconvient time (according to Murphys law), when I had word + excell + powerpoint documents open - thank god for office auto-recovery!

10x 1.325 V prime failed instantly and I had a blue screen before I could up the volts. At 10x 1.350V I got the blue screen after ~2 hours of prime torture.

The big question now is if it is worth running the system with such a small undervolting giving only a very small increase in battery life at the cost of risking a system crash eventually?

UPDATE: My system freezes sometimes at 4x 0.975V setting, even though it can run Prime Torture for several hours without errors.

CONCLUSION: For my system undervolting is only good for decreasing the maxium temperature, not for increasing the battery life.

Since my system runs prime torture stably at 4x 0.950/0.975V I'm wondering if the problem may be related to other kinds of settings in the RMClock than the volt setting. The problem may also be related to the switches from high to low settings (e.g. if there is a transient period of 10x with only 0.950 V during switching from high to low setting.)

Why don't you switch back to normal Voltage and find out?

Just tested some games, and it actually seems that the undervolting trick reduces the temperature of my machine with 5C (e.g. from 72C to 67C in Call of Duty Demo). I think that the reduced burning of my fingers is more valuable than 5% more battery life. Let's hope I don't get any blue screens with 10x 1.375 (knock on wood). It seems that ACER/AMD may have set a 5% safety margin on the Turion voltage. But then again, it may vary from CPU to CPU (http://forum.notebookreview.com/showthread.php?t=20249).

ive been running stable for more than a week at:


4x .950

10x 1.325