Black screen first, now more problems

Hey good folks at tom's!

Got a problem maybe ya'll could help me investigate.

So the problem starts after I download and start playing a new game called Dragons Nest.

I played for maybe 15 minutes and my screen flickers and goes black and says "No signal" (This is a 32" TV not a computer screen FYI)

It happens again after I restart my computer. So I give up and go to play another game I usually play. No problems playing that what so ever, played for many hours that night. I start up Dragons Nest again and boom, 5 mins in, black screen, this time with a looping buzzzzzzzzzzzzzzzzz coming from my speakers. So I downloaded the newest drivers for my geforce 9800gtx+, the problem still happens again!

So then I go and jump on my other game, frustrated with Dragons Nest. And low and behold, that game stalls out about 10 minutes in saying there was an issue with a driver. What's with the progression? What is happening to my hardware? Software?

Do I have to buy a new card?

EDIT: This system has been up and running for 1.5 years, so it's not like it's a new build and im testing out the kinks, i have a 680w PSU and nothing on the hardware has changed.