[Bug 30349] GA-MA78G-DS3H (F9d) & Radeon 4730 system suddenly, but not quite randomly, softresets

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=30349

--- Comment #15 from Jouko Orava <jouko.orava at iki.fi> 2010-12-17 18:07:26 PST ---
> oh, don't tell me i'll have to replace a device at a christmas eve in forth
> time in a row :\

Be prepared. I wish I had prepared better. I think I'm out of warranty, too.

Post-mortem: One of the K3919 M81 voltage regulators -- second one in the outer
row, counting in from the edge -- *blew*. It's about 30% expanded, with
high-temperature damage also in the motherboard around the regulator legs.

My rig used a 65W TDP Athlon64 X2 4800+ with a huge Noctua NH-U12 heatsink, and
three 120mm Noctua fans wired to a front panel controller with four thermal
probes, in an Antec Sonata 500 case. The northbridge heatsink did get up to
58'C, but none of the other components *ever* exceeded 36'C. I also monitored
my three HDD's temperatures using hddtemp; it was consistently about 1'C higher
than the thermal probe mounted on the outside (as one might expect). 

Therefore, I'm confident this was not *thermal* damage, but a faulty component.

This also ties in completely with the symptoms. The motherboard does have
hardware protection, shutting down/restarting in case of a voltage problem.

You should see if the motherboard voltages fluctuate when starting mplayer.
(lm_sensors and some hardware monitor panel application should do.)

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