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Do I Need a New Power Supply for My PC?

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Last Modified: 2016-10-27
Hello,

My custom-made PC just crashed for a reason I have never seen before.  I was using it for about 90 minutes this am when it just turned off.  There was no flickering of the office lights or any indication of a power problem.  The system re-booted and it came up to BIOS screen that included the following message:

Power supply surges detected during the previous power on.
ASUS Anti-Surge was triggered to protect system from unstable power supply unit!
Press F1 to enter set-up.


I entered set-up, reviewed all the screens, did not see anything related to this issue so I exited BIOS with no changes.  Booted in Safe Mode.  Rebooted and all seems fine.

The PC is plugged into a decent UPS that did not sound any alarm.  When there is a power surge in the office, I usually hear a click from the UPS and other devices.  This time - nothing.

When I built this PC I was careful to chose a fairly high end-power supply.  The model I am using is the CORSAIR HX Series HX750 750W ATX power supply.  It is rated 80 PLUS GOLD.  The full name includes "12V 2.3 / EPS12V 2.91 SLI Ready CrossFire Ready 80 PLUS GOLD Certified Modular Active PFC Power Supply".  The PS was purchased in July 2012, so it is still under warranty for another year.

This has never happened to me before.  If this was a personal PC, I would be inclined to wait a few months and see if it ever happens again.  This is my primary work PC and I really do not want to have a PS failure, or worse, an event that corrupts my system.

What should I do?  Should I replace the PS?

Also, not sure if this is relevant, but the PC was shut down for a few days.  Before turning it on yesterday, I opened up the case to clean dust off of fans.  I used a combination of manual wiping of the fan blades and compressed air.  I did NOT do anything with the PS fan, just a few puffs of air around the PS case. Nothing near the PS fan exhaust.   My efforts solved a noisy case fan problem.  I don't think this is relevant - but thought I should mention it.

Thanks!

P.S. While in BIOS I noted the following Voltage readings (this was after the reboot)

3.3 V = 3.344
5V = 5.080
12V = 12.288

I am not sure what the tolerance is for my board, but these seem to be pretty much on spec.  Of course, this is what it was AFTER the reboot.  I am not sure if there is a way to look for a reading at the time of the crash - such as a log.
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