Fairly Serious crashes

[Akeldema]

Used to run 3 fine, and I only 3 box anyway: :P, shouldnt take to long for a crash to happen/not happen i give it, probaly 6 hours without a crash till im 90% sure the card caused it

[Zappy]

Not knowing too much about your setup, so this may not even be close.

I run an i7 extreme with 3 280GTXs on a corsair 1000 watt. I had random lock ups, and video garbage displayed similar to that screenshot, and after taking some time going through everything, I found that I was crossing rails from the power supply. Once I wired everything properly, all appears to be well. So if your video card requires multiple power inputs, make sure they are on the same rail.

[Akeldema]

just ran a stress test overnight not a single crash, so i believe the video card was faulty, contacting my supplier today to see about a warranty claim.