My CF 5970 is having alot of trouble playing it at a comfortable fps. People are recommending me the Asus Ares, but I don't know. PLease suggest me something that can get the game to at least 30 fps
First of all don't change you cards.2 5970's are the fastest(or one of the fastest) multiGPU setups available.
Because CS 1.6 is fairly old,disable CrossFire and see if it helps