Cazalan :
Athlon 64 - When metallic pens and xacto blades could overclock and make cpus work on dual CPU boards.
That was the Athlon XP series, not the Athlon 64. The Athlon XPs used the same socket as the dual-CPU Athlon MPs and could be modified to be both SMP-capable and overclockable by filling in laser-cut traces on the CPU package. AMD locked multipliers in firmware for A64s and put desktop and server in different sockets.
If you are talking about great AMD CPU hacks, I think the "golden fingers" overclocking on Slot A CPUs and core/cache unlocking on Phenom IIs have to rank up there as well. I wonder if Bulldozer will have any similar things out there or if it will be like A64 and have none.
popatim :
And it helps that it was a powerful cpu for its time, taking on p2's that were clocked twice as high. I think the first P2 that ran faster than my PPro rig was a 450. I just remembered I was overclocked to a whopping 225. Wow! LOL
The PPro was very fast due to that full-speed L2 cache. They were also ridiculously expensive too, although I seem to remember the 300 MHz Pentium II Klamath was some ridiculous sum like $2000 when it was introduced as well. Just curious, what kind of PPro machine did you have?