The AMD FX-57 is today's best processor for gaming. If you are looking to buy a gaming computer, get this chip. No other CPU performs nearly as well. Remember, the FX- 57 is a single core processor.
(The AMD FX-59 is the dual core replacment for the FX-57. It will probably come out along with games that support dual core technology, allowing it to take the title of "Best Gaming CPU")
Also, don't be fooled into thinking 2 cores means better performance. It doesn't, especally with today's games. However, when games designed for dual cores arrive...