Review: Athlon 64 3400+: "This relationship between clock rate and real world performance in the Athlon 64 line of CPUs is extremely encouraging. Provided that AMD can continue to make 200MHz jumps in clock rate at a good pace throughout the year, the company and their x86-64 architecture should be in great shape.. While the Athlon 64 FX-51 is still a great performer in some benchmarks, the 3400+ has practically made it obsolete as a mainstream CPU. It will take a boost in clock speed and a transition away from registered RAM to really make the FX series pull ahead. Fortunately, both changes are planned early this year. "