The Antec KuHLER H2O 650 delivers high-performance liquid cooling for your CPU in a quick, easy-to-install package. Unlike traditional liquid cooling systems, this self-contained unit comes prefilled and requires no maintenance. In addition to easy installation, a powerful PWM fan pushes air through directional blades and channels it for optimal cooling. Engineered for maximum performance, the Antec KuHLER H2O 650 delivers liquid cooling performance at an air cooling price.