Computer Crashes when gaming and GPU stress test! Help!

Greetings.

I am having trouble with my computer atm. I am using my computer avg 4-6 hours a day and mainly for playing video games. I normally have no trouble what so ever, and would really like some help from you guys.
Yesterday during my gaming my computer started "grey-screening" all of a sudden even with no extreme GPU reliant gameplay. So basically my monitor turns grey, but I can hear my sounds. I have to force shutdown the computer and reboot. I started reading some forum threads online and tried GPU stress testing. After using Furmark and 3DMark I experienced that in both programs running either benchmark og simple stress test, my computer will crash after 1,5-2 minutes. At first I was worried it was the heat, but it usually crashes at 55-60 degrees.

Things I have tried:
Cleaning the insides of my computer, both GPU, CPU and PSU.
Deleting and/or updating/reinstalling graphic driver.

Specs:

MB: ASRock Z87 Pro3 (CPUSocket)
%1 Chipset

Processor: Intel Core i7 @ 3.50GHz
Haswell 22nm Technology

Video Card: 3071MB NVIDIA GeForce GTX 780 (ASUStek Computer Inc)

Storage: 223GB Crucial_ Crucial_CT240M50 SCSI Disk Device (SSD)

RAM: 16 GB

PSU: Corsair CX750m

Operating System: Windows 7, 64-bit

PS: I don't really have any other components to try and deductively find if a component is defective.

Think you for reading, and I would gladly hear your thoughts.
2 answers Last reply
More about computer crashes gaming gpu stress test
  1. What is the make and model of the PSU?
  2. Emerald said:
    What is the make and model of the PSU?


    Oh sorry, I forgot to mention.

    It is a Corsair CX750m
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