Sniper_X

I have an Alienware M18x R1. I have upgraded the RAM to 32 GB, I have a Intel Core i7 Mobile Extreme Edition i7-2960XM CPU I plan to install. Regarding the GPU's, what is the max config possible for highest performance? Will I need to flash a modded BIOS? Sorry for the n00b questions, but there is just so much posted about these things, that it's hard to nail down who is talking about R1 vs R2, and what MAX config i really working, vs/. which are being "tried out".