I have a ASRock M3A770de motherboard (socket AM3), 8 Gb of ddr3 1066, Sapphire Asus GeForce GT 630 graphic card, I want to game and would like to know what the best cpu would be Athlon ll x2, x3, x4 or Phenom ll x2, x3, x4, I was told anything over 2 cores is waste, as most games can only...