Intel's current Core i7-7700K processor is a beast on its own, but at 7.2GHz? That's another story, something that German overclocker 'der8auer' has hit, using liquid helium.
The overclocking milestone for the 7700K was reached at the ASUS Absolute Zero event, and overclocking event that saw Der8auer pushing the CPU to 7.2GHz using liquid helium cooling. Liquid helium is impressive, as it sits at an insanely cold -296C (around 70C lower than liquid nitrogen).
Liquid helium cooling is more expensive than LN2, but it does go 70C lower than LN2. Are we looking at the next level of overclockers using liquid helium, which costs around $4300 for 33oz of the super-cool stuff.