Factory filled with coolant, then sealed and pressure tested – requires zero maintenance for years. Compact and durable all in one waterblock secured with 12 stainless steel bolts. Waterblock machined out of a single block of copper for the best possible heat transfer. Precision machined Micro Channels maximize the water contact surface to quickly dissipate heat. Compact 120mm aluminum radiator fits in virtually any case, internal or external. Fin design optimized for minimum air restriction to reduce fan speed and noise. 120mm PWM fan with a wide RPM range to fine tune and balance fan noise and performance. Blue LED indicator lights up when operating. Performance Comparison: Product Description Factory filled with coolant, then sealed and pressure tested – requires zero maintenance for years. Compact and durable all in one waterblock secured with 12 stainless steel bolts. Waterblock machined out of a single block of copper for the best possible heat transfer. Precision machined Micro Channels maximize the water contact surface to quickly dissipate heat. Compact 120mm aluminum radiator fits in virtually any case, internal or external. Fin design optimized for minimum air restriction to reduce fan speed and noise. 120mm PWM fan with a wide RPM range to fine tune and balance fan noise and performance. Blue LED indicator lights up when operating. Performance Comparison: