[coreboot] Is PI-AM2RS780G supported ?

David Hendricks dhendrix at google.com
Wed Jun 24 09:30:56 CEST 2009

On Tue, Jun 23, 2009 at 2:28 AM, Alois Schlögl <alois.schloegl at tugraz.at>wrote:

>  The reason for asking is the bug as described here:
> http://bugzilla.kernel.org/show_bug.cgi?id=13573
> The bug is affecting my research at the university.
> It was suggested that a Bios-update could solve the problem.

IIRC you can disable thermal throttling, but it's usually not a good idea if
you expect to keep your machine running with reasonable performance under
load. If the vendor BIOS had the proper tables (See section 2.4.2 on
P-States in the AMD BIOS and Kernel Developer's Guide for Fam10 processors),
your CPU would slow itself down to avoid generating too much heat. If you
disable thermal throttling and continue to run your workload, your CPU will
hit "Tjunction" at around 116 degrees C and shut itself off abruptly,
possibly after physical damage has been done to the CPU or the socket.

I would suggest starting with something much simpler, like making sure you
have quality thermal transfer compound applied in the proper quantity for
your CPUs. I know it sounds stupid, but I have seen many machines from many
datacenters with very powerful rack cooling overheat under heavy loads due
to improperly applied thermal grease. There are many tutorials and videos on
how to do this. Make sure you clean off the old thermal grease first with a
high-concentration isopropyl alcohol (>90%) first.
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