Time marches on. PC processors get faster. But this one is unusually quick, especially when overclocking. The cool-running 3.3GHz Intel Core i7-975 Extreme Edition is a $1000 quad-core chip currently aimed at gamers who can afford to spend $8000 on a PC, but don't let that discourage you. This will be an average processor a couple of years from now.
It starts getting geek-gasmically astonishing when you hear tales of the guys at Hot Hardware Review overclocking this sucker, revving it up beyond 4.1 GHz. They reported the chip wasn't even breathing hard at that much-higher speed, and only noticed a "small voltage bump" when the chip reached its 50°C maximum temperature. And that was with a normal heatsink, no fancy liquid cooling required.
Get one of these babies, and you'll be living the future. For a short while.