Ralf Hutter wrote:
If you're using the BIOSes Hardware Monitor to check your temps you're probably in worse shape than you think. You need to know your CPU's max temp under load. Sure, you can run some CPU-intensive app to heat up your CPU then reboot and check the BIOS temps but P4's cool off very fast once they go from load to idle. Just during the time your system is shutting down and rebooting you could very easily be getting a 6-8°C drop in your CPU temp. Therfore whatever temp you're seeing in your BIOS after immediately rebooting is definitely somewhat lower than your actual load temps while in the OS.
If those temps of 62-63°C are taken from the BIOS after rebooting you are actually running ±70°C while in the OS. That's right at the temp where the P4 starts thermally throttling itself for protection. You need to fix that. I wouldn't even thing about trying to make your system quieter until you first cool it down to more reasonable levels.
First off I'd try and find a software temp monitoring app that runs in Linux, then start figuring out how to cool things down. You really need to know what your correct temps are.
First, thanks for the warning.
Last night I did really push the CPU by having it play itself in chess for 20 minutes or so. CPU utilization was 100% for the entire time. I then rebooted and the BIOS monitor showed the CPU at 34C. I then tried the same test again, but this time I touched the heat sync in the middle of the run. It was warm, but not hot. So I think the CPU is getting pretty well cooled.
The higher number you are referencing were from an earlier test, with a different heatsync/fan combo at 5volts. I obtained these by just leaving the system in the BIOS hardware monitor page for 20 minutes or so. It was very interesting to watch the temps climb over time.
However, I want some numbers with the system running a "real" load. I am going to play a bit more with the linux system. If I can't get numbers soon I may just swap the disk and put in one with Windows 2000 or XP. If I do that I will be able to duplicate the testing that other people are doing.