I am asking this question for my friend. He wants to build a new system and he has a doubt about the processor. If i were to place a Phenom II X3 on an AM2+ board would there be any performance decrease since the board is not AM3? I asked this because if I were to buy an AM3 board the I would have to buy DDR3 memory which is too expensive. Also can you guys suggest a motherboard supporting Crossfire under 120$?