Reboots while gaming

Hello,

First of all, here are my PC specs:

- i5 4690k cpu
- Gigabyte GA-Z97X Gaming 5 mobo
- 16gb (2x8gb) crucial ballistix sport ram
- XFX R9 280 gpu
- Corsair HX850 modular psu

I am having an issue with my machine rebooting. Prior to installation of my first R9 280, I could run games without issue. When I installed my 280, I was getting some vertical lines of contrasting color, followed by looping sound crashes. I was then forced to reboot as the video driver failed. This could also be triggered by running gpu stress tests. I removed the 280, and reinstalled my two 5770s in crossfire, and had no issues. I RMAd the 280, and it recently arrived. After installing it, I ran the FurMark gpu stress test at max load for 1.5 hours without issue (max temp was 69C). I tried running CS:GO earlier, and within 10 minutes, the cpu rebooted twice. There were no signs of overheating, and no other visible symptoms. I have the most up-to-date drivers installed, and I have tried reverting to older drivers, to no avail. I am literally at a loss for ideas. Any help is greatly appreciated.

Edit: I should note, I have ran all of the Prime95 tests for numerous hours, with no instability issues. I also just ran WhoCrashed, and after analysis, it did not recognize any recent crashes.

 

does your computer just freeze or auto-reboot ????
U haven't said what Hard drive set up U are using ???
HHDs
SSDs ??????
I have been playing COD AW PC for last fiew days----
I have a SSD O/S / storage HHD set up with windows 7 home premium ---
when I first installed windows 7 on my SSD I had followed everybody advice & optimized
it---turned Page File way down & turned off PreFetch & SuperFetch.
well--
I kept getting """low memory""" warnings from windows 7 with COD AW running--
to get my system stable for COD AW ---I had to turn Page FIle back to """System Select''''
even though I have 8 GBs of ram-----
my computer just Froze several times while I was trying to figure out what was going wrong--
-----
doing some reading ,, the latest generations of SSDs (200gb +) are a lot tougher than the earlier ones---
they will live a lot longer than U could take to fill them up with cache writes to the SSDs over the years--
just need to turn off defrag for the SSD----windows 7 & above does this automatically--
James

 

The computer reboots itself. I'll be mid-game and a second later I'm seeing the BIOS after the reboot. I forgot to mention I am using a SSD, a Samsung 850 Pro. Page file has been unaltered; however, I have disabled hibernation to rid myself of the file associated with that.

 

yeah
at the time I thought a 120 gb SSD would be plenty with
my pictures ,,stuff on HHD
now I regret it.
with COD AW wanting 55 GB storage &
GTA 5 wanting 60 GB storage
I wish I had a 300 or bigger SSD.
I got my Steam Game storage file on my HHD and I,m
wondering how much better large scale games
would play on the SSD. Especially like GTA 5
I know this isn't helping your present problem.
James

 

I should also note that I am running Windows 8.1 64-bit, fully updated.

Anyone have some suggestions?