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I've also seen an issue where a particularly 'green' power supply was incompatible with the UPS it was connected to. When the UPS went on-battery, the computer would turn off. I suspect the UPS's approximation of a sine wave wasn't close enough.
– Slartibartfast
Commented Mar 9, 2014 at 21:31
"Good" PSUs generally put themselves in a "security" mode where you can't turn on the PC again when there's something like a short-circuit. You've to unplug/plug it back (or use the power switch on the PSU) to shut it down, then you can restart the PC. It seems more like a CPU overheating problem, and the motherboard shutdown itself to prevent damage. (can be a chipset overheating problem too, but it doesn't happen as often as the CPU. Might be GPU too)
– piernov
Commented Mar 9, 2014 at 22:29
@piernov - Except that the description talks about "no overheat on any elements". I don't know about this PSU security mode, although certainly you do need to leave some PSU's off for a while to discharge fully if they experience a short or overload condition.
– davidgo
Commented Mar 9, 2014 at 22:35
@davidgo Honestly, i little bit aware with the PSU. But with no real test and no other PSU unit its hard to made decision to buy new PSU unit and installing it. Any method how to troubleshoot this problem except try to change the hardware one by one ?
– Hendra Nucleo
Commented Mar 10, 2014 at 0:38
I know for the overheating, but it is the most likely to happening. You should run stress-tests like OCCT. You'll have both figures for temperature and voltage. It may help to diagnose the problem.
– piernov
Commented Mar 10, 2014 at 10:43

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