Wierd Display Bug on late 2010 iMac

[Noamyoungerm]

I have been getting this wierd display bug several times. Restarting the computer usually works, but it comes back after an hour or so. Any help? Note that the bug appears behind windows and other objects. If this is any help, the window shown is a Bitcoin GPU miner (www.bitcoin.org for more info)

Screenshot

 

[NutsNGum]

Genius Bar?

 

[Noamyoungerm]

Genius Bar?

I'll take it there if it gets worse.

 

[AC Rempt]

Looks like a bad vid card to me. If it keeps coming back after an hour, it might be due to heat build up. I'd take it now.

 

[TEG]

I'll take it there if it gets worse.

Sooner, rather than later. It looks like an overheating issue.

TEG

 

[flipster]

Video card is gone, take it to Apple and have them replace it. Show them this picture.

 

[Noamyoungerm]

If it's Video card overheat, then I'll stop using my Bitcoin Miner. It's GPU Intensive. Do you think any permanent damage has been done if I've been running it for about a week.