Athlon 64 FX-51 tested at 2.6, 2.8GHz
AMD has been hyping its Hammer architecture's scaling abilities for a while, but Ace's Hardware has put those claims to the test with some extreme Athlon 64 FX-51 overclocking. With the help of an exotic cooling solution, Ace's tests the Athlon 64 FX-51 at 2.6 and 2.8GHz, and the results are impressive indeed. It also looks like Athlon 64 FX-51 processors have unlocked multipliers, provided you can get your hands on the right BIOS.
It's unlikely that AMD will have the Athlon 64 running at 2.6 or 2.8GHz with stock cooling anytime soon, but that won't stop the vapor-phase and water cooling crowd from squeezing every last MHz from the chip.