Macci broke 15k in 03 with a dry iced X800 XT Plat at something like 700mhz core clock and he said he still had some room to go, this is sans vold mods and cascade cooling, the
CPU wasn't really pushed either (A64 @ 2.8ghz I think?) Wait till he Cascades a volt modded one with a 4.5ghz P4EE or a 3.3ghz Athlon FX