HKEPC has got its hands on the brand new, upcoming AMD Athlon 64 X2 6400+ Black Edition CPU and given it a thorough trashing through a wide range of benchmarks. They've also compared it against Intel's Core 2 Duo to see how it stands up against the competition.
Although it performs quite well in comparison to the Core 2 Duo E6750, it doesn't really have a chance compared to the E6850. Nor does it stand up well in the game tests, as it's beaten hands down in the real world games, but manages to better the E6750 in 3DMark 06.
But AMD is going to have to suffer until the next quarter, since it will be launching its new Phenom CPU then, although at very low clock speeds of around 2GHZ initially. The Phenom FX80 might hit 2.4GHz at launch, but AMD hasn't confirmed any clock speeds as yet. HKEPC has a list of what they presume the launch speeds will be and what features the various Phenom chips will feature if you have a look on page one of the article below. Please note that it's all in Chinese.
You can find the benchmarks here