When enthusiasts look to keep their computers cooler they tend to progress from air, to liquid and then perhaps something more exotic like phase change cooling. If it might keep a CPU cooler and make a computer run faster odds are an enthusiast has tried it.

Boutique computer maker Hardcore Computer, Inc. has announced its Reactor computer. The Reactor claims to be the world's first commercially available computer that uses liquid submersion cooling technology.

Hardcore floods the inside of the chassis with a dielectric fluid it calls Core Coolant to keep all the heat producing components of the computer cooler. The CPU, motherboard, RAM, dual power supplies, and video cards are all submerged under water.

The hard drives are not submerged and are hot swappable with trays on the outside of the computer. Components used in the system include Creative X-Fi sound, a range of Intel Core 2 processors, up to 8GB of RAM, RAID options and more.

Graphics for the machine are via NVIDIA with single, SLI, and 3-way SLI 9800 GTX, GTX 260 or GTX 280 options. A fully loaded system with SSDs, HDDs, GTX 280 3-way SLI, QX9770, 8GB of RAM and more will set you back over $10,500.

Upgrading the system may be a challenge, but the motherboard tray is removable so draining the fluid to upgrade components isn't required. Cables are routed outside the chassis and the CMOS battery and BIOS switch are mounted on top of the chassis. The motherboard used in the system uses the NVIDIA 790i Ultra chipset.