What can you expect when you put two monkeys (aka macci + The Stilt), 20l bottle of Ln2 (liquid nitrogen, -196C) and some nice high-end hardware (in this case a 3.6GHz P4) to the same little room?
A computer system clocked to 6GHz?
The crazy fellows used the following equipment to reach the magical 6GHz:
CPU: Intel Pentium4 3.6E
M/B: ASUS P5P800 (Vagp, Vddr w/ OCZ DDR Booster)
RAM: KHX3200 256x2
VIDEO: GF2 Pro
PSU: OCZ 520W
COOLING, CPU: LN2 (-196C)
COOLING, M/B: water+156W TEC

According to them it was "Stable as your mate after a bar evening at 4am!" at 6GHz. But clocked a bit lower, at 5.4GHz, it was pretty stable in SuperPi.
More info at
XtremeSystems and
Akiba PC