We've seen systems sporting overclocked Core i7 2600K CPUs before. Some, like Dino PC's Evolution 2600K, clocked the chip all the way up to 5GHz. We approved.
Cyberpower is the latest to join the grossly overclocked 2600K club, the CPU in this system weighing in again at 5GHz. It's done it in style too, by water-cooling the chip so it stays well within safe temperatures at 100 per cent load.