About an hour ago i heard a noise as if a fan was hitting something, I discovered it was my SLI setup with my GTX 460's, so I grounded myself and moved the one around a bit, the noise stopped, just now I experienced a black screen saying no signal while i was playing a game. I had to manually restart, any ideas whats going on?
try removing the cards and re-seating them in the slots. clean out any dust from the fans. You sure its a fan noise? maybe the PSU arcing out. What are your PSU specs and what cards are you using in SLI?