I have a Gigabyte motherboard with an Intel ICH-9 chipset, and a
3.0GHz Core 2 Duo (E8400). The coretemp sysctls seem to always show
50C as the baseline temperature:
$ sysctl dev.cpu | grep temp
This is with a big PSU fan, a good CPU fan, a clean heatsink, and two
case fans aimed the right direction (front fan pulling cool air in,
rear fan pushing warm air out). If I reboot and go into the BIOS, I
get numbers around 42-43C. I know it's kind of hard to compare
directly, but the coretemp numbers are from a totally idle system with
powerd scaling it back to 373MHz, so it should be as cool as when
sitting idle in the BIOS screens. When I work the system hard, like
running "make -j4 buildworld", I see temperatures up around 63-64C,
and I'm almost positive that's not right.
Any ideas why coretemp and the BIOS would show such different numbers?
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