I have read posts in the past which say that Poser runs faster on AMD chips. I just got a new PC with AMD 64bit CPU. It's hard to tell how much the CPU helps cause I also got 2 gigs RAM and a Raptor HD, but it the new machine is Poser fast. I can manipulate 2 or 3 M3s or V3s in a scene now without it feeling like they are submerged in molasses.