AMD's Phenom II CPUs have caused a furor during the last weeks since some of the processors can be overclocked to more than 6 GHz with liquid nitrogen.
The test system. (picture: http://www.planet3dnow.de)
German overclockers tested three Phenom II CPUs and could confirm the good results. They achieved more than 5.9 GHz with a chip that was run with more than 1.9 volt. Thanks to extreme cooling they could even run benchmarks like the 3DMark 06 with more than 5 GHz. By their own account they achieved a "respectable result” with the overclocked Phenom II processor. The key to success were the low operation temperatures of partly under -190 °C.
"SoF"‘s CPU caused problems while overclocking under -160 °C because the used mainboard, Foxconn's A79A-S, missed an important function: The Phenom II processors only tolerate lowest temperatures if the HT clock is restricted to about 1,000 MHz.
"MusicIsMyLife”, "Hoschi" and "masterchorch" validated 5925.91 MHz, a short experience report can be found on Planet3dnow.