Hello, once again tomshardware. I am trying to find the best upgrade I can get. Currently I have the powercolor radeon 7750 DDR5, amd phenom II x4 965 BE, Antec 450w psu, 4 gb ram, GA-78LMT-S2P. I want to upgrade CPU and graphics card for under, maybe, $200 - $100. I don't want bottle necking so tell me what I need.