This new flagship processor, clocked at 2800MHz (the highest external frequency ever seen on an AMD processor product) with 1MiB of L2 cache memory and the full gamut of features and ISA support that a latest-revision San Diego core brings, raises the bar in terms of overall single-core x86 performance, usually by the rough 7% clock increase FX-57 gets over the 2600MHz FX-55.
Gaming performance is simply unmatched and for the target Athlon 64 FX audience, that's paramount. The well-heeled enthusiast and gamer are the guys and gals picking up the FX range, the unlocked multiplier and high-frequency, full cache performance really appealing to them. High price is the only barrier to the fastest stock-clocked gaming performance money can currently buy.