Hey guys - new to PC and PC gaming. Recently purchased an XFX HD6950 2GB graphics card, and looking to either upgrade or maybe use the crossfire technology to buy another one of these cards for double the performance. How do I know if I can use the crossfire with 2 xfx cards with my mobo? My mobo is a IPISB-CU (Carmel2). I bought a stock HP computer (h8-1124) with the i7 processor, and just swapped out the stock gpu for the XFX, as well as added a 650W psu. Keep in mind, I'm not incredibly tech savvy when it comes to PC's, so any help is greatly appreciated!