My pc currently has a GTX 750 GPU installed. What is the biggest GPU I cpould fit into it, without causing additional problems. I am not the most intelligent pc person out there, but I know my games are getting about 750, so I'm looking to see what will fit in this tiny, compact case. Any help is much appreciated as I really want to make this work, and not toss it all away for a new PC. It works great, other than force signing me out for GPU over-usage.