Trying to diagnose GPU, Mobo or PSU problem

[Chris_315]

About a week ago my PC started crashing. It usually crashes to a random colour and the sound looping. I figured my GPU was dieing but then the PC wouldn't boot straight after a crash, sometimes it will take nearly 20 minutes to reboot. When I power on during this time fans spin and lights come on just no display. Even when I plug monitor into motherboard for onboard graphics during this time it won't boot.

Other things that have happened:

Had couple of page fault errors.
Tested memory using windows and said ok.(should have used memtest?)

Checked HDD's and found error on one(my storage HDD not where windows is loaded) and repaired. Crashed again soon after.

One time plugged pc into other monitor to check monitor. PC restarted during reboot and said bios corrupted and automatically changed to using backup bios.

When my PC is loaded it runs perfectly fine until I do anything graphical so every Heaven benchmark I run crashed and any gaming I attempt crashes sooner or later.

specs:
Intel Core i7-4770K 3.50GHz
MSI HD 7950 Twin Frozr III Boost Edition 3072MB
Gigabyte Z87-D3HP Intel Z87 (Socket 1150) DDR3 ATX Motherboard
XFX 750W XXX Edition Modular '80 Plus Silver' Power Supply
Samsung 120GB SSD
Patriot Viper "Black Mamba" Generation 3 8GB (2x4GB) DDR3 PC3-15000C9 1866MHz

Any help greatly appreciated,

Chris.

 

[hang-the-9]

You have a bunch of errors here, need to start testing parts one at a time and see where the issue is. Try with one RAM stick at a time, test the video card in another system or another one in yours. Check for a BIOS update for the motherboard, re-seat the connections and devices. If anything is overclocked set it to stock speed.

 

[Chris_315]

It was my Graphics card. I ordered a new one and everything has been fine since. Thanks.