Yeah, it's a radical rig and would not work for a "desktop" system. Overclockers use liquid nitrogen because it pulls heat from the cpu very quickly. When overclocking radically the power going through the chip generates massive amounts of heat (just like a 100w light bulb is much hotter than a 40w). So this only works in a "lab" situation. Modern cpus do much more work each clock cycle so they end up faster overall than the one in the video. You can check out "overclocking" on google to find out about the latest overclock records. Benchmarks are a much better way to measure performance (mostly).