I just got a new dual core hot rod computer up and running that will do 4+ ghz without breathing hard.
New system:
Dual core 3.16 ghz wolfdale chip with 6mb L2 cache, 1333 buss
ASUS mother board with automatic overclocking feature that will throttle the whole system voltages/cpu/fans up and down according to demand. It will overclock way past 4 ghz if needed.
2gb super fast DDR3 Corsair ram running at buss speed of 1333
3gb / second SATA drive
Here's mix #6
http://www.el34world.com/Misc/Music/files/HandofShiva6.mp3