In this pretty popular helicopter flight simulator Athlon 64 3400+, Athlon 64 FX-51 and Pentium 4 XE 3.2GHz processors ensure about the same performance level. By the way, their price is almost twice as different.
The tests in three pretty new gaming applications, namely Gun Metal, Tomb Raider: The Angel of Darkness and demo X2: The Threat, show about the same results. The CPUs with AMD64 architecture show their strengths here and outperform the competitors, even including Pentium 4 Extreme Edition.
As a result, I could say the following. The performance of Athlon 64 3400+ in gaming applications is very close to that of Athlon 64 FX-51, and sometimes is even higher than that. Both these processors work at the same core clock frequency and the differences in their memory controllers, which seem radical at first glance, do not let Athlon 64 FX-51 processor win an indisputable victory with a significant advantage. As a result, Athlon 64 3400+ processor can easily compete with Intel Pentium 4 Extreme Edition 3.2GHz, which is the today’s fastest CPU offered by Intel, leaving it notably behind in most cases.