Yesterday AMD Phenom II X4 CPUs that were cooled with liquid nitrogen got overclocked. AMD had organized an event and invited the famous extreme overclockers "Sampsa” and "SF3D”.
The liquid nitrogen cooler F1 EE by “kIngpIn” served well.
"Sampsa" says that none of the used Phenom II CPUs suffered from a "Cold Bug” which normally leads to the fact that a CPU does not work properly any more.
All tested chips could be overclocked to more than 6.1 GHz clock speed and were run with around 1.95 Volt. As 6 GHz were stable with the 3DMark 05 and 06 the Crysis CPU test even ran with 6.1 GHz.
One example could even be overclocked to 6,280 MHz - with all four processor cores. For record attempts it is common practice to deactivate single CPU cores in order to achieve even higher frequencies. Furthermore "Sampsa” assumes that the achieved results are not the maximum for the Phenom II X4. However, the overclocker only published one CPU Z screenshot which shows a CPU clock speed of 6,045.7 MHz.