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Computer shuts down because of detected surge


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The main Computer shuts down because:

Power supply surges detected during the previous power on.

ASUS Anti-Surge. was triggered to protect system from unstable power supply unit!

The computer then boots into BIOS to Reset.

I exit BIOS. The computer boots into Windows 8.1 as though the previous incident never happened.


Component List:

O/S: Windows 8.1 Pro 64 Bit

Case: Corsair Obsidian Series® 650D Mid Tower


PSU: Corsair HX750W 750-Watt Modular Power Supply

CPU: Intel Core i7-3770K BX80667i73770K Processor

CPU COOLER: Corsair CWCH60 Hydro Serituck ones H60

Video: MSI Geforce GTX 550 N550GTX-Ti MD1GD5v2

Memory: Corsair Dominator CMD16GX3M2A1600C9 16GB DDR3

Memory: Cooler"Corsair Airflow Fan For Up To 6 Modules

APC-UPS Pro 1500 Battery Backup and Surge Protection.

C:\ Drive is Intel Solid-State Drive 520 Series - 240 gb

E:\ Drive is also a ntel Solid-State Drive 520 Series - 240 gb

F:\ Drive Intel SSD 40 gb


The shut down events are many and totally random without correlation

to any particular task. I removed the UPS to eliminate that as a cause

but the issue persists.



Shut down Events List:

08-01-14 at 11:00 AM

five more at various times

07-25-14 at 8:50 PM This shut down happened pre post `then booted OK

07-25-14 at 6 PM

07-25-14 at 9:10 PM

07-23-14 at 11:25 PM

07-23-14 at approx. 2 PM

07-22-14 at 11:20 PM

07-22-14 at 4:10 PM

07-22-14 at 6:52 PM

07-20-14 at 4:00 PM

07-17-14 at 8 PM


This problem and variations of it, has and is being reported by many in several

forums with a wide variety of possible solutions mentioned.

To date, we have not received a definative answer.

The Mother board blames the PSU and the UPS and the local ac supply source.

The PSU blames the mother board and around and around it went.


Some of the replies we received from forums related to the suspect components

suggested fear of a warranty claim. All we asked for and wanted was the cause so we

could repair it. That never happened.


Although I believe the PSU is still under warranty, in the interst of time

I will purchase a replacement from a local distributor.That should have been

done July 20th after all this started rather than waste all this time.

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We have two P8Z77-V PRO/THUNDERBOLT motherboards running on Antec 550W PSUs. One of them began the surge protection thing every once in a while, the other didn't. These PSUs operated older motherboards for a long time. While a PSU can introduce its own fluctuations, but being on good UPS systems with plenty of overhead so I know they are getting clean power, I opted to shut off the surge sensor, as it seems to be a bit of a hair trigger. No issues.
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As stated in my previous post, the alleged offending HX-750 PSU was replaced with an Corsair AX860i our cost $ 224 and change. Funny, the shut downs have stopped.

When the HX 750 was in place the computer shut down every 20 to 30 minutes..We could not do any accounting for fear of data loss or do a backup every 10 minutes

If the issue as stated in those replies is a finicky P8Z77 main board, I can look forward to more unexpected shut downs. Right?

Cheers, and thanks for all the helpful

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How long (days, months, years?) did the offending system run in a stable condition before it became prone to shutdown?


If the problem is a finicky main board, the problem may eventually return but not necessarily as the system-level performance of the MB/PSU combination that you have with the 860i might have mitigated it.


In any event, I hope that it remains stable for you.

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