My idle net6501-50 with no fan, standard case, USB boot device,
mini-PCIe WiFi, two hard drives, and Linux is at 48C CPU temp right now
(ambient 9C).
As I understand it, the CPU temperature sensor is relative to a
parameter called Tjmax (maximum junction temperature), but the hardware
provides no way for software to determine this parameter. The Linux
driver requires a special option to set the correct Tjmax ("coretemp
tjmax=90"). I presume OpenBSD needs a similar option.
-Peter
On 3/19/2013 7:24 PM, David Ruggiero wrote:
I've searched and read through the -tech archives and though CPU temps
and cooling have been discussed several times, I'm not seeing direct
answers to the questions I have.
I've running a newish net6501-60 loaded with OpenBSD 5.3 "current" and
a Crucial M4 mSATA SSD. No hard drive, no other components, just a
standard case, SSD, and power supply.
1) OpenBSD > "sysctl hw.sensors" returns 65-68C for the CPU temp *at
idle*. That seems quite high to me, given that the ambient temp in the
room is just 15C (cool basement), and Soren wrote here last year
saying to expect about 32C over ambient. So: 15C+32C = about 47C
expected. And I'm 20C over that. Yikes,.
But perhaps "hw.sensors" in OpenBSD is buggy for this box and/or a
compensation factor is needed to interpret its output? What are others
folks seeing for idle temps using OpenBSD when they run that same
command?
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