My favorite rig was definitely my AMD Mobile Barton 2500+ with an Abit NF7-s 2.0, 9800 pro, and BH-5 memory in a blue Chieftec case. I had overclocked before that, but this was the time where I really got into it with volt mods and pin mods on the CPU/memory. I pushed that system to the max on air with an (IIRC) Thermalright SLK-800. Most of my friends had similar rigs and we would get together at someone's apartment and have 24 hour games sessions.