ok I know i'm a total noob. I'm running a i7 920 oc'ed to 4.1 gig with 3 gig of memory. I have a single GTX480 vid card. I have a GTX 260 sitting in a box. Its my old Vid card. Would installing it as a physics card do anything for me? I primarly use this rig for Games and benchmarking when I get new hardware to try out. Any and all info woould be helpfull for me to understand what its for and how it works.