My New Computer Restarts and/or Freezes at Random - Completely Lost

Kwade_R

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Oct 26, 2014
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4,510
I built my new computer less than a week ago. The computer runs flawlessly except for one issue - it restarts itself and/or freezes at random.

The computer will simply shut itself off instantly and boot itself back up, as if nothing happened. No BIOS screen, no BSOD, nothing.

It has restarted itself a total of 5 times in a window of 5 days (3 restarts happened in one day), running on average 12 hours a day. Some of the restarts have happened on a fresh boot after being turned off for the night, and some have occurred after a few hours of use. It has never crashed while being in a game (which has been running at maximum settings), and has only crashed when launching very low usage programs, or when alt-tabbed out of a game - not sure if this has any significance or just adds to the randomness.

I have also tried running the games and programs at minimal settings which still resulted in a restart. I have even stress tested the computer with multiple programs from times ranging from 1-3 hours, which did not result in a restart.

The computer runs flawlessly, with no hiccups whatsoever.

I'm completely lost and am asking you all for help.

Specifications:
Motherboard: MSI Z97-G55 SLI
CPU: Intel Core i7-4770K
w/ Cooler Master Hyper 212 EVO + Arctic Silver 5
Memory: G.SKILL Ripjaws X Series 8GB (2 x 4GB) 240-Pin DDR3 1866
Storage 1: Samsung 840 Pro Series 256GB 2.5" Solid State Drive
Storage 2: Western Digital BLACK SERIES 1TB 3.5" 7200RPM Internal Hard Drive
Video Card: EVGA SuperClocked w/ ACX Cooling GeForce GTX 770 2GB 256-bit
Power Supply: EVGA 600 B 80 PLUS BRONZE Certified 600W
OS: Windows 7 Basic
Case: Cooler Master HAF X

Have tried:
- Restoring BIOS to default/less intense settings
- Running everything at minimum (games, windows themes, etc.)
- System Restore to a completely untouched OS
- manually unplugging the reset switch from the motherboard
- Disabling the system restart settings (it still restarts regardless)
- Auto fan settings / full power fan settings (although temperatures have always been on the low side, never exceeding 65 degrees on stress tests / 35 degrees on idle)
- Leaving BIOS screen up for long periods of time (it never restarts when in BIOS, only in Windows)

Currently waiting to try:
- Swapping RAM
- Swapping Power Supply

Any information will be helpful, and I'm willing to run any tests that may be required and display results (I have run many of them already).
 

Kwade_R

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Oct 26, 2014
9
0
4,510
The whole system does shut off and then turn back on - the restarting. Also, if it was the PSU then how would it explain the computer freezing, yet still having power?
 

Exclusions

Reputable
Oct 14, 2014
92
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4,640


Did not see that part. If it was the PSU it can power off completely then restart. I can't explain the freezing.