The NH-D9 TR5-SP6 4U is a quiet 92-mm CPU cooler for workstations and servers with AMD Threadrippers and Epyc processors that use sTR5/SP6 sockets. The TR5-SP6 is based on the proven design of the DX model with dual-tower heatsinks and the entire heat spreader covering contact area and uses 2 of the award-winning, PWM-controlled 92-mm NF-A9 fans to achieve high performance and excellent acoustics. The airflow direction of the NH-D9 is parallel to the longitudinal axis of the socket. Rounded off by the pre-applied NT-H2 thermal compound and the SecuFirm2™ mounting system for sTR5/SP6, which has been adapted to the increased pressure specifications of the platform, the NH-D9 TR5-SP6 4U forms a complete premium package. Caution: Please note that the NH-D9 TR5-SP6 4U is a special version for AMD sTR5/SP6 sockets. Owing to the larger contact area, it cannot be used on smaller sockets and is not compatible with the Noctua mounting kits for these sockets.