AMD Athlon 64 X2 6000+ at 2.6 GHz
The Athlon 64 X2 6000+ (90 nm) was limited to 2.6 GHz and a single core to allow for the direct shootout against the Phenom. A 65 nm Athlon 64 X2 models appears to be the better choice, but only at first glance: the performance difference between the 65 nm and the 90 nm models is virtually nothing. We could not run power consumption tests, as we didn't have the tools to physically switch off all unused cores.