Whenever I am playing a game after while the PC locks up the monitor goes blank and the orange light appears but I can still hear sound in the background, then when I restart my computer everything on screen is pixelated and there are little square blocks around the screen (don't know how to explain it better). Anyways if I wait a awhile and start it up again everything seems fine everything not graphics intense works out fine but when I go into a game where my GPU are under strain the crash eventually happens. I increased fan speed from 20% to 50% in rivatuner and I opened my case and put a outside fan pointing at it, this seems to have delayed the crashing but it still eventually happens. My GPUs are running at 50C and 51C idle right now which is pretty cool, I haven't checked what they get up to under strain but I can't imagine it is too high.