Koolance rocked the water cooling world when it released its Exos. It was the first self contained, external water cooling kit ever. Since then, Corsair has hopped on the external cooling wagon as well. The benefit of self contained external water cooling is ease of use. Assembly is simple, and relatively painless. In a “normal” water cooling kit, installation and bleeding are time consuming tasks. In essence, the Exos is water cooling for the common enthusiast.