pareng John, taken from tomshardware.com.....

The Athlon64 FX clearly beats its archrival's processors in most of our benchmarks. The Intel processors all collect points, in some cases dramatically, in speed-sensitive applications such as rendering or audio and video compression, and with applications optimized for HyperThreading. However, as soon as 3D applications and games are run, FX steamrolls ahead. That must be annoying for Intel, since the Pentium 4 Extreme Edition is targeted for these applications.

Take note that the A64 runs at about 1GHz less and costs $200 cheaper