On Tue, 13 Nov 2018 13:14:46 -0800
Conrad Meyer <c...@freebsd.org> wrote:

> You can adjust dev.amdtemp.N.sensor_offset as needed.  By default, the
> amdtemp sysctl gives you the unadjusted value.  On different Ryzen
> models the raw value is wrong by different amounts.  E.g. on my 1950X,
> I have sensor_offset set to "-27" to show correct temperature
> readings.
> 

Looks like new AGESA/BIOS change something, my fork of amdtemp now show (read) 
same value as on onboard led in "CurTmpTjSel"
...
dev.amdtemp.0.rtc.CurTmpTjSel: 47.7C
dev.amdtemp.0.rtc.CurTmp: 96.7C
...
49C diff, this was some sort of offset for older AMD CPU, used to calc 
CurTmpTjSel then it set to 3.
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