PC Crashing without BSOD

[Jezarulz]

Recently, my computer has been crashing without a BSOD.

The screen turns black and the audio becomes a long staticky monotone.

This crashes happened occasionally but are now happening all the time.

At first, they would occur when I tried to run games such as Civilisation 5 but now occur after a few minutes of use, such as casual browsing.

I'm not sure what course of actions to take and am fairly new when it comes to hardware issues.

SPECS:
CPU:Intel Core i7 930 @ 2.80GHz
GPU: SyncMaster (1680x1050@60Hz) 2048MB ATI AMD Radeon HD 6900 Series
RAM:6.00GB Triple-Channel DDR3 @ 534MHz (8-8-8-20)
Motherboard:ASUSTeK Computer INC. P6X58D PREMIUM (LGA1366)
HDD:119GB G.SKILL FALCON 128GB SSD ATA
OS: Windows 7 64-bit

 

[George92]

What power supply do you have and what video card ? ( 6950 or 6970 or 6990 )
Something like this is happening to me only in games and i can't figure out what's the problem.

 

[Jezarulz]

What power supply do you have and what video card ? ( 6950 or 6970 or 6990 )
Something like this is happening to me only in games and i can't figure out what's the problem.

It's the 6950 and my PSU is the Corsair TX850M. It seems to be getting worse :X

 

[George92]

Seems your PSU is a very good one, guess that's not the problem. If you have a friend willing to make a swap of video card for few days , it would be great. This way you could see if it is the video card defective ( which may be) or something else.
I did a swap with a friend, and untill now , none of us had a crash untill now. This is very odd.

L.E. You could monitor the temps, maybe something is overheating.
L.E.2 If i understood right, you should have 3 sticks of ram @ 2 Gb each .If so try to swap the sticks between them and if it does the same, try to put only one stick at a time and see if it continues to restart. Or if you have only one stick of 6Gb just change the slot.