Intel fans be polite and stifle those snickers, but at the Games Convention in Leipzig, Germany, members of AwardFabrik.de managed to breach 4GHz on an AMD Phenom 9950 processor using liquid nitrogen cooling. Not without controversy, the feat failed to pass CPU-Z's validation.
Running at precisely 3952MHz, the team recorded a 19.954 second SuperPi 1M time, setting a new record for AMD processors. Other hardware used in the endeavor included a Foxconn A79-S motherboard and an OCZ 1KW power supply.
On a related side note, SuperPi may find itself being replaced as processor technology moves forward. While the world record for AMD CPUs now sits at just under 20 seconds, the record for an Intel processor is 7.14 seconds using an E8600 overclocked to 6376MHz, leaving little headroom for future record breaking attempts.