The best way to overclock the CPU, is through the BIOS. It's the only way to get a true and stable overclock. With the stock HSF included, you could probably take it to 2.8-3.0....with an aftermarket HSF, like the Arctic Cooling Freezer Pro 64, you can go a bit further. I would talk to nagasama or Apokalipse, as they are experts at AMD overclocking.