Graphic card causes computer to crash

nav197707

Honorable
Jan 17, 2013
10
0
10,510
I recently made a budget gaming computer, it was fine for a few days then suddenly it started randomly crashing my computer, this carried on for 6 weeks. I did all the memory testing, updating drivers. When i took the graphics card out i have had no crashes since. Is this compatibility issue or a simple case of a bad graphics card.
 

nav197707

Honorable
Jan 17, 2013
10
0
10,510


the graphics card is a ZOTAC GeForce GT 630
motherboard is the Gigabyte GA-78LMT-USB3
8GB of RAM
the processor is a AMD FX 3.8 GHz Processor
Running originally Windows 7 64bit, but downgraded to 32bit to see if that was the source of the problem.
When the computer crashes it doesn't turn on unless i unplug from mains wait 3 seconds and plug it back in.
The power supply is 850W.