Noctua NH-D9DX i4 3U, Premium CPU Cooler for Intel LGA2011 (Square & Narrow ILM), LGA1356 and LGA1366 (Brown) Compact dual-tower design combines strong cooling performance with excellent case-, RAM- and PCIe-compatibility Only 110mm height is ideal for HTPCs, ITX, Small Form Factor or 3U builds; Does not overhang the RAM or PCIe slots on most current motherboards Highly optimised NF-A9 92mm fan with PWM support and Low-Noise Adaptor for automatic speed control and ultra-quiet operation SecuFirm2 Mounting system for Intel LGA2066, LGA2011-0 & LGA2011-3 (Square ILM & Narrow ILM), LGA1356, LGA1366 (wtih Xeon backplate). Includes award-winning NT-H1 thermal compoudn. Trusted Noctua quality backed up by 6-year manufacturers warranty.