We learned that three to four percent of K10 Barcelona processors can actually hit speeds higher than 2.5 or 2.6 GHz. This is finally good news as AMD doesn’t need much more of these super fast CPUs to beat Intel in the high end. The trouble is that the majority of CPUs are doomed to life under 2.5 GHz.
These chips are reported to hit between 2.8 and some of them even 3.0 GHz which is exactly how much AMD needs to compete with Penryn and the current Intel 65 nm Quad cores.
The big question remains how are you going to utilize the performance of all four cores, as in most of the applications you won't see any benefit by going from dual core to quad core.
In current games you don’t see the any advantages which signals that in games the K10 Phenom FX won't be faster than the upcoming and much cheaper dual core Kuma CPU, but it will be faster clock to clock than the Core 2 Duo or Athlon X2 or FX.