One of them has managed to push an AMD Phenom II X4 975BE to a whopping 7.13GHz, setting the new world record for AMD CPUs. The exact clock was 7134.31MHz and the processor was cooled with nitrogen.
Although we’ve seen higher clocks in the past, they were achieved on ancient Celerons and Pentium 4’s, which really can’t be compared to a contemporary quad-core.
You can check out the screens here.