12-07-2016, 06:31 AM
Join Date: Dec 2004
Location: Nebraska, USA
OS: Win10 64-bit Professional
Wow, your voltages are extremely tight - not sure I have ever seen a supply output exactly 5.000V and 12.000V and certainly 3.296V at just 4/1000ths of 1 volt off exactly 3.3 is exceptional too. The tolerances allowed should not exceed ±5%. Your worst is down an infinitesimal .122% which is amazing.
But that is only at one load level and one point in time so I agree with DB and you need to try another PSU, if for no other reason than to eliminate yours from the equation.
Note the ATX Form Factor standard requires all PSUs to maintain output when there is loss of power (or sag below 90/180VAC) for a minimum of 16ms. Many PSUs (including top rated PSUs) struggle with this as that is shorter/faster than the time it takes for humans to detect a flicker in the lights (which is about 30ms). This means a sag (opposite of a surge) lasting 18ms, for example, is long enough to cause your PSU to stop outputting power, yet you would not even be aware there was a drop of power. This is just another reason why I say all computers should be on a "good" UPS with AVR (automatic voltage regulation).
So if you have access to a "good" UPS with AVR, I would connect that too as a good UPS with AVR typically has a "reaction" time of less than 10ms - plenty fast to use the batteries to "boost" the voltage back up, or if necessary, cut-over to battery power completely.
The one load level point is the same with your temps. They look just fine there, but what happens when under load? Is the interior clean of heat trapping dust?
Have you scanned for malware?
Have you inspected your motherboard for bulging/leaky electrolytic capacitors? These are tall soda can shaped components, many of which typically surround the CPU socket. A failing/faulty cap can have too much pressure build up inside causing the cap to bulge at top. When the pressure relief points (often a K or X stamped in the tops) give way you will see white to brown, dried foam oozing out the tops, or sometimes bottoms of these caps. A common symptom of a failing cap is sudden, unexplained shutdowns or reboots.
You might also pull half your RAM and see what happens. Then swap in the 2nd half and see what happens.
Do note that intermittent problems are the most difficult and time consuming to troubleshoot, especially if you cannot duplicate them on-demand. So have patience.
Lastly, because sudden power outages can corrupt hard drives, back up your data now.
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