We just posted a news article about Robert "Crotale" Kihlberg, Swedish
Overclocking Champion, latest attempt with overclocking Intel's latest
Pentium Extreme Edition 955. With liquid nitrogen he managed to bring the
processor up to 6609MHz(!). A round of SuperPi landed him at 19.953s, a
result few can measure up to.

Link:
http://www.nordichardware.com/news,2800.html