Re: Which AMD CPUs are supported -- temperature

From: mike tancsa <mike_at_sentex.net>
Date: Thu, 13 Feb 2020 11:35:18 -0500
On 2/13/2020 2:22 AM, Peter Jeremy wrote:
> On 2020-Feb-12 15:23:51 -0500, mike tancsa <mike_at_sentex.net> wrote:
>> Not sure about the older Athlon CPUs, but the 2 generations of Ryzen's I
>> have seem correct as well as an APU
>>
>> CPU: AMD GX-412TC SOC                                (998.17-MHz K8-class CPU)
> OTOH, I'm not confident about temperatures on my APU.  The publicly
>
>> And on a fanless APU
>>
>> # sysctl -a dev.cpu.0.temperature
>> dev.cpu.0.temperature: 62.6C
>>
>> # sysctl -a dev.amdtemp.0.core0.sensor0
>> dev.amdtemp.0.core0.sensor0: 63.1C
> At what ambient temperature?  I see a similar value from my (idle) APU3
> but don't believe the (implied) ~35K junction-to-ambient difference.

Actually, it does seem a bit high. This is read from a PCEngines APU3. 
Since the CPU dissipates heat off the bottom metal case, I cant point my
thermal laser temp reader directly at the CPU. Reading the temp off the
top of the mother board with the top of the case off, I cant find any
spots hotter than 35C... So 62C is probably a lot higher than it
actually is.

    ---Mike
Received on Thu Feb 13 2020 - 15:35:19 UTC

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