I have read from a few places that this video card is buggy? They seem to be from earlier machines should mine be problematic? After a month or so and a logic change due to an unrelated problem I am NOW facing intermittent black flashes.. I restarted once and it was good for a few hours then it started up a bit albeit not as frequent as before. Now I have switched to high performance mode, so will see what happens. Is there anything i can do ?