Most PC’s are air cooled, some extreme machines have water cooling, but this little puppy is ‘Liquid Submersion’ cooled. Yes, you read that right: the buzzing insides of this uber-performance PC are submersed in a non-conductive liquid (an oil, really).

The patented cooling system allows for extreme performance without frying your boards or chips. The system circulates the coolant through a radiator at 2.5 gallons per minute, effectively providing a cool heat-exchange medium to every component on every available millimeter of surface.
The Hardcore machine uses oodles of custom or customised parts and can run up to three top of the line graphics cards without breaking a sweat. There’s two fan-cooled, 3.5″ SATA hot swap bays in the rear of the case but the Reactor has three 2.5″ slots which are outfitted with three Samsung SLC-based SSD drives. Do not put normal harddisks in these slots folks, they will most likely die in the liquid. Oh, and the machine has redundant power supplies, so you will probably expire before this puppy does.
Available from around USD 4000 for the base model the price is hefty compared to your run-of-the-mill system, but not when you take into account all that this powerhouse delivers. The stats are awesome and the full spec list is yummy.
Go check it out, Maximum PC did an excellent test & write-up of this beast.
Hardcore Computer via Maximum PC