5 heatpipes and premium grade 120mm fans for excellent cooling efficiency, slim 120mm size for high compatibility, ideal for quiet workstations in noise sensitive applications (A/V, engineering, etc.) Supports both E1 (LGA4677-1) and E2 (LGA4710-2) socket Intel Xeon Processors CPU carrier frame required (included with boxed retail CPUs and available separately for tray CPUs) Two state-of-the-art NF-A12x25 fans (push/pull dual fan configuration), supporting PWM for automatic speed control through the motherboard: silent at idle, full CFM performance when necessary Pre-applied NT-H1 thermal compound and easy, straightforward installation with included Torx T30 mounting tool