Classic memories, 300A - 450mhz magic, as good as a P2-450 but much much cheaper.
Then, Celeron II 566 - 850mhz magic...
Then Athlon 1ghz to 1.333ghz ... magic
Then P4 1.6A to 2.1Ghz instantly .... (i'm a wuss, chip can do more)
Overall, that silly 300A started it all for me.