Update: Actually it wasn't the video card that was at fault. it was those two stupid mushkin 2gb ram sticks
Apparently the Mushkin HP3-10666 SDRAM is not exactly compatible with my motherboard. It would make the computer crash after about 10 minutes everytime.
So i asked the store to test the 12800 ones on my system while it was there and if it runs successful for a day or two straight then i'll buy the new memory.
So later today i'll be picking up my new and now working PC
I thank everyone on this forum for all the help and support i received during these difficult times.