What are the side-effects of overclocking your graphics card?!?!

[gamingguy27]

I have a 6800GT which i have overclocked to an ultra, and i have never had an artifact or (slow down) so what are the implications (if any) of overlcoking within the graphics cards limits?

Thanks, Alex

 

[Supra]

Possibly a shorter lifespan of the card but really only noticeable if the card goes up in flames. Just kidding :hotbounce