hameem 1 :
how about 2 of HD 6850 for $310
or 2 of gtx 460 for $300 .. nvidia has physics
nice


PhysX is what you mean. They both can perform physics with the right engine. PhysX is a special physics engine made by Nvidia, which both can use in most cases, as most games that use PhysX, use it on the CPU. However, there are 20ish games (probably growing closer to 25 by now) that can benefit from GPU accelerated physX. These games do better with the Nvidia cards. Crysis and Crysis 2 do not use PhysX.