http://www.xbitlabs.com/articles/cpu/display/athlon64-x2-3800_12.html
Performance seems to be acceptable,but nothing spectacular about it
..only the pricing seems to be attractive..
"We will not repeat what has already been said about the application of dual-core architectures in general. I would only like to say that according to the benchmark results, Athlon 64 X2 3800+ appeared a faster processor than its competitor from Intel, the Pentium D 830. So, it looks like this new AMD solution has pretty promising future ahead. Especially, if we take into account the compatibility of dual-core AMD processors with the existing infrastructure, their low heat dissipation, Cool’n’Quiet technology support and the ability to switch to 64-bit operating systems and corresponding applications."
Performance seems to be acceptable,but nothing spectacular about it

"We will not repeat what has already been said about the application of dual-core architectures in general. I would only like to say that according to the benchmark results, Athlon 64 X2 3800+ appeared a faster processor than its competitor from Intel, the Pentium D 830. So, it looks like this new AMD solution has pretty promising future ahead. Especially, if we take into account the compatibility of dual-core AMD processors with the existing infrastructure, their low heat dissipation, Cool’n’Quiet technology support and the ability to switch to 64-bit operating systems and corresponding applications."