AMD's Bulldozer has the honor of being in the Guinness Book of World Records for achieving the Highest Frequency of a Computer Processor.
The record set on August 31, 2011, in Austin, Texas by "Team AMD FX," a group comprised of overclocking specialists working alongside top AMD technologists, reached 8.429 GHz, breaking the previous record of 8.308 GHz.
Now that Bulldozer is available for public consumption, an overclocker named Andre Yang claims to have pushed the chip to 8.462 GHz. He did so with a core voltage of 1.992V on an Asus Crosshair V Formula motherboard.
Somebody call Guinness.