I'm from Malaysia and building up a new PC for architectural usage (modeling and rendering) at the moment I'm in dilemma on choosing the right processor to be used with the graphic....should it be AM3 or C2Quad...the other thing is...i was mentioned that for more than 6GB ram we will need 64 bit OS....can i use 32 bit softwares (3d max/ sketchup etc) on 64 bit system? Thanks all