The NH-D9 TR5-SP6 4U is a 92 mm compact, quiet premium CPU cooler designed for workstations and servers using AMD Threadripper and Epyc processors that utilize the sTR5/SP6 socket. The TR5-SP6 is based on the proven foundation of the DX model, featuring its dual-tower heatsink and full-contact surface, and employs two of Noctua's award-winning, PWM-controlled NF-A9 92 mm fans in their higher RPM variant to deliver strong performance and excellent acoustics. The airflow direction of the NH-D9 runs parallel to the longitudinal axis of the socket, making it ideal for builds where hot air is expelled in this manner. Complemented by pre-applied NT-H2 thermal paste and the professional SecuFirm2 mounting system for sTR5/SP6, which has been updated to meet the increased pressure specifications of the platform, the NH-D9 TR5-SP6 4U forms a complete premium-quality package for quiet cooling of sTR5-based Threadripper workstations and SP6-based Epyc servers in 4U cases.