Koolance Inc. PC4-1025SL ATX Full Tower Case - The PC4-1000 1kW series is for heavy thermal applications with multiple heat sources: multi-CPU, video cards, and other components which can benefit from high heat capacity liquid cooling. The PC4's cooling backbone is comprised of two main parts: a full-length heat exchanger, and a combined reservoir/pump/control in a single 5.25" bay unit.