AMD earned the Guinness World Record for the highest frequency of a microprocessor at a recent invite-only event in Austin, Texas. The team of elite overclockers and AMD staff was able to take an eight-core Bulldozer FX CPU up to a staggering 8.429GHz, surpassing the previous record of 8.308GHz.

The tech event took place about two weeks ago but due to nondisclosure agreements, media isn’t allowed to speak about everything that took place just yet, says Anandtech. Details regarding the overclocking potential of the new platform, however, are finally able to see the light of day.

AMD had three stations on hand to demonstrate varying levels of overclocking. The first station used a closed loop water cooling kit from Antec which was able to push a hexa-core CPU up to 4.8GHz. A phase change cooler was installed at the next station and took another FX CPU to 5.894GHz using 1.632 volts. Liquid helium was needed to shatter the world record. It's worth noting that no benchmarks were run and that CPU-Z was used to verify clock speeds.

Hot Hardware was on hand for the event and claims that the CPUs used for testing were early AMD FX-8150 processors, and that only two of the eight cores were enabled for the record-setting run. 

“We applaud AMD for their entry into Guinness World Records for achieving the Highest Frequency of a Computer Processor,” said Guinness World Records' Freddie Hoff, who is presenting the award today at the AMD Fusion Zone, a technology showcase in San Francisco, Calif. “We congratulate everyone involved in this record-breaking achievement.”

Today's award ceremony takes place just blocks from the Intel Developer Forum, which runs from September 13 to 15.