Micah wrote:
I'm really beginning to doubt it's the PSU. Why? I cannot get the
output voltage to drop no matter what load I throw at it. I plugged
in four additional hard drives and ran a system stress test and still
the voltages remained rock steady at the values I stated earlier. I
ran it for an hours with the high-low monitor on a Fluke multimeter.
The +5 stayed near 5.1 with 5.08 as the bottom, and the +12 stayed
near 11.89 with 11.84 as the minimum. I even had one of the "random
segfaults" and the +12 voltage never dropped below 11.84. I'm not
sure how I can get the load any higher without using resistors which
most certainly does not simulate the load I'm generating while compiling.
That leaves memory, CPU or mobo. I ran memtest86+ and it reported no
errors. I'll run it again for an extended period of time while I'm at
school to see if it reports anything. That leaves CPU and mobo.
Anyone got any ideas how to test those? The only system test I can
run that does report an error is Lucifer 1.0 (on the ultimate boot
cd). The mprime test and cpuburn do not find any errors.
The usual advice is to run memtest86 overnight, but I'm not convinced it
will find a fault related to either temperature or load, since memtest
seems to cause neither. Still, worth a try.
When I was arsing around with overclocking, I could reliably crash the
machine (IIRC) like this:
run cpu burn
run mprime (or was it a pi generator? can't recall now...)
wait for temp to hit max
kill cpuburn!
wait < 5 mins for either machine to crash or prime/pi test to have error
I was fairly convinced at the time that it was the memory which didn't
cope. This is possibly not far off what happens in a big series of
stressful compiles.
As for diagnosing faults, you may be down to replacing components one at
a time and seeing if it makes a difference. That's easier when the
machine crashes quickly, so if you can find something which reliably
crashes it, that's good. If you have >1 memory stick and the machine
will run with a single stick, try each stick in turn. You could also
try deliberately under-performing the memory and see if that makes it
reliable. Was the memory you go on the compatibility list for the mobo?
Hope that helps,
--Alex
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