Screen shutting down but pc is still running

i recently upgraded my gpu to gtx 550 ti . after a day started playing diablo 3 then the screen shut down on me but the pc is still running. here's my spec
phenom ii 965
500 psu
biostar ta785 ge hd
8 gigs ram
two dvd drive
500 gb hd
. for some reason it only happens when i play games. but when im just surfing its perfect. need help please or im just gonna return the card. do i need a psu? heating up to much? need help please
2 answers Last reply
More about screen shutting running
  1. i believe its the gpu, or it could be your psu, can you tell me which brand your psu is??
  2. Have you upgraded your drivers? It is also possible that it could be too much heat.
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