Hi i am thinking of building a rig for my friend and i was wondering which cpu should i go with. I already have with me a q6600 and a Athlon 760k but i do not know which one is better. Also the q6600 is paired with 4gb of ddr2, 760k paired with 2gb of ddr3 and either cpu will be used with a gts 250 powered by a 400w atx psu. So which one is better for gaming?