On 23 May 2007, at 18:17, Jeremy C. Reed wrote:

> I have a laptop that normally powers down when I am compiling some 
> software. I guess it is a feature when it overheats. Other than that it 
> works fine (and has been on 99.99% of the time for over 6 months).
> 
> Any suggestions on how I can get it to run slower? I am guessing if there 
> is a way to make it slower it wouldn't overheat.

I have similar with a desktop using Asus P4S800D-X m/b. On XP the 
temperature control seems to work. On both NetBSD and Ubuntu I've 
tried with different sensor modules but none seem to be detected. On 
Ubuntu some benchmarks seem around 67% of what I get from NetBSD but 
Ubuntu seems stable and NetBSD would hang after between a few minutes 
to couple of days depending on ambient temperature and load. I've now 
underclocked in bios from 2.66GHz to 2.0GHz and NetBSD hasn't locked 
up since with cpu temp check from bios being 4C lower. If we have 
similar hot summer to last years I'd expect increase in ambient by 
about 8C so not much chance I can use NetBSD then. Critical cpu temp 
seems to be about 47C which seems rather low so I might try refit of 
cpu/heatsink. I've already added an extra case fan but no amount of 
fan cooling is going to take internal temp below ambient. I'll also 
try a bios upgrade if one is available and last resort will be a 
replacement cpu. Last week I updated most of 650 packages from source 
without any overheating problem being evident.

David