On Nov 25, 2004, at 12:19 PM, Jean Delvare wrote: >> (added Andrew to CC as he also answered my original email. Don't know >> if sensors at stimpy.netroedge.com allows non-subscribers) > > Yes it does :) Now I hope acpi-devel does too. > >> This reminds me: about a year ago my CPU fan burnt down. Then too, >> shortly after booting the PC, it slowed down. Then by accident I >> noticed in BIOS CPU temperature 98 deg C. With a new fan problem >> disappeared. > > Wow, 98, no less. You're lucky it didn't catch on fire, you know. > >> So, can it be, that the BIOS automatically slows down (throttles) the >> CPU at high temperature. > > Yes this is certainly what happens. Blinking power led usually means > that some kinf of thermal or power management is in effect. > The P4 will throttle itself when it gets too hot but at least some older Athlons won't without some external (bios?) monitoring. Tom's Hardware made a great video a while back showing a P4 slowing down when getting too hot, and a couple Athlons going up in smoke @ 300 degrees C when the heatsinks were removed: http://www4.tomshardware.com/cpu/20010917/heatvideo -05.html#download_the_first_toms_hardware_test_lab_video They got a lot of heat for producing this video. (pun intended) Phil
