X-bit Labs reports how an overclocked Celeron M beats AMD's flagship:
I would like to stress that 21 seconds for PI calculation is a typical result for such CPUs as Core E6600 (2.4GHz) or dual-core Athlon 64 FX-60 overclocked to over 3.0GHz. I think you would agree that it is a more than impressive result for a CPU worth less than $150 – Celeron M 420 (1.6GHz). Its performance, as well as overclocking potential are truly remarkable here. I only wish that we didn’t have to hunt for specific $200-mainboards to be able to use this CPU in our desktop platforms.