2018-11-05 21:23:22 UTC
So ... I have the lowliest threadripper ... the 1900X in a motherboard that
I dual-boot between Windows 10 and FreeBSD.
Under windows 10, the variable fan stuff behaves. Under light load, the
CPU sticks around 40C and under heavy load it can spike as high as 55C as
the water pump and fans spool up.
Even though the variable fan stuff seems to operate under FreeBSD (as a
function of the motherboard's microcontroller or whatnot), as I was having
problems, I disabled the feature and set all fans to simply "on" or 100%.
kldloading "amdtemp.ko" reports an idle temp of 55C or so and heavy
compiling (make world -j32) reports temperatures as high as 95C ... upto
and including some instability and/or crash or rebooting.
... now... is this due to thermal throttling not kicking in? Is windows
miss-reporting the temperature? Is FreeBSD miss-reporting the
temperature? Has anyone else experienced this?