Because the Athlon II x2 uses AM3 socket, and FX6300 uses AM3+, you'll need a new motherboard. And at that point, I'd recommend switching to an Intel-based processor if you want to see more improvement in fps while gaming. For example, the i5 4590. If you purchase from MicroCenter, you'll receive $30 off of your motherboard purchase to help offset the cost of a more expensive processor. That's my two cents.