If you haven't joined the PCStats forums, what are you waiting for?
Looking for ideas on How to softmod a 6800/le/nu/gt to Quadro4000? Perhaps you're the Proud New Owner of an ATI Radeon X1900XT, or just looking for suggestions when it comes to upgrading an old AGP video card.
PCSTATS Forum user "Kiang" has done up a cool little self-made digital temperature/fan-control with LCD for the PC and this watercooling rig by "Avid6eek" is pretty impressive all by itself.
There is a visual guide to Computer Maintenance Procedures by "Zafram" that could help you boost the speed of a lagging rig... so what are you waiting for? Come on down to the PCSTATS forums and participate in the whole shebang.