My very first overclocking venture was with an AMD K6-2 400 @ 450. It just got so hot, couldn't push it a lot. Next was a Celeron 500 @ 613, following by a Celeron 566 @ 1018 MHz. I used a peltier and some huge ass GlobalWin heatsink and a 120mm fan
Currently I still have my Dual PIII 700 @ 933, running like a charm
