I swapped my K6-2 400 for a Celeron 300A, aside from the fact that it overclocked to 450Mhz, the Celeron walked all over the K6-2 at 300Mhz even. They are extremely weak in the FPU department and 3DNow! does little too help. I would say it is about as fast as a P2-233/266, which is fine for office apps/general Windows apps, but not good for CPU intensive tasks and games.