I have an Alienware M17X-R1 and over the weekend I was playing Star Wars: The Old Republic when my game became stuck, pixelated, and then went to blue screen:

I have scoured Google for a solution and have tried everything I have seen posted but nothing works. My system operates fine in integrated mode but once I enable my 260m card the screen goes black and the caps and number lock indicators start blinking and I'll have to do a hard reset to get back into integrated mode. According to my device manager I only have a single 260m. Would it be possible for me to upgrade to (2) 280m cards? I may have found a used set but I'm worried about wasting $300 compared to buying a new system.