Did my PSU kill graphic card??

My PC worked fine last night. Then I turned it on in the morning for about an hour and shut it down. Couple hours later when I went to play Left 4 Dead, my game froze and I got a blue screen. The PC restarted and afterwards I kept getting screen artifacts. At first, it wasn't that bad but it progressively got worse to the point where I could barley see anything.

I had recently gotten a 680 W power supply unit only 4 months ago. The power supply unit manufacturers offer a 1 year warranty so if it's their fault I want to at least get a new power supply unit. Can someone please confirm if this is most probable reason? And what should I tell them in email without sounding too rude because I'm a bit ticked off right now if it's because of their PSU...

I really don't think it's over heating issue because I barley use the PC for more than 4 hours a day, and it's very clean internally too. I can't check my CPU temps because I can barley see where I'm clicking on my screen with the graphics artifacts...

PC Specs:
2.53 Ghz intel quad core
Nvidia geforce 8800 gts 640 mb
2 GB ram
680 w power supply
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More about kill graphic card
  1. How can u be sure it's not an overheating? :)
    U must check it to make it sure.
    Did u connect the power connector for your card?
    And about your PSU, what brand? model?
  2. I will try again tomorrow to see temperatures. I can find out with CPUZ?

    I have my PSU unit connected to video card otherwise I'm not sure what you mean connect the power connector...

    and this was the PSU I bought: http://www.newegg.com/Product/Product.aspx?Item=N82E16817709015

  3. Sunbeam sucks, by power connector he means the 6-pin leading from the PSU.
  4. 40 amps on the 21 volt rail is pretty poor specs for an alleged 680 watt PSU.

    One of these has more usable power:
    Corsair 550VX (41 amp 12 volt rail)
  5. So I'm guessing there is no reverting this problem right? I've been reading other topics and everyone says you need to end up getting a new video card...

    also is GPU same thing as video card?

    Edit: umm, this might sound dumb but someone on another forum linked me to this http://www.youtube.com/watch?v=R7jUqoKVY-k

    Is this even possible to fix it?
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