Hi, I have a question regarding my second graphic card. I actually have a radeon 6950 2gb (it's an XFX) I want to get myself another one to crossfire with my xfx... should I get the exact same model, or can I buy the same card from a different brand (like HIS or MSI...)??? Also, there are a lot of XFX 6950 cards that have weird names like "695x-CNFC".... What's the difference between these and the ones with the normal name on 'em?? Also, what does Crossfiring involve? Must I reconfigure everything? If I already have my first card "shaders unlocked"... must I undo that unlock before crossfiring...? Basically, can someone give me a little step-by-step guide to what I should do from purchasing the new card to installing it and configuring it?