Noctuas DX series has become a standard solution for low-noise, high-performance cooling in the Xeon sector. The latest i4 release supports LGA2011 (both Square ILM and Narrow ILM), LGA1356 and LGA1366-based Intel Xeon systems, and the new D9 model offers greater efficiency and compatibility than previous 9cm versions: Thanks to a base area of 95x95mm and the reduced height to 110mm, the NH-D9DX i4 is fully 3U compatible and does not protrude on the memory banks on LGA2011 Square ILM and LGA13xx. At the same time, the double tower design and the new NF-A9 PWM fan provide for an even better cooling performance with minimum noise development. Together with the professional SecuFirm2⢠mounting system as well as Noctuas NT-H1 quality heat conductive paste, the NH-D9DX i4 3U forms a complete premium package for quiet cooling of Xeon workstations and servers.3U compatibilityThe NH-D9DX i4 is only 110mm high: That is 15mm less than the previous 4U compatible 9cm cooler of the DX series and thus the NH-D9DX i4 also fits in 3U casing â ideal for noise-sensitive 3U applications such as in the audio or video area.100% RAM compatibilityWith its base area of 95x95mm, the NH-D9DX i4 does not hang on the current LGA2011 Square ILM, LGA1366 and LGA1356 via the RAM slots. This not only ensures easy access to the memory modules, but also full compatibility with modules that have high heat sinks.NF-A9 Premium fanThe highly optimized features Noctua's special AAO framework system as well as advanced aerodynamic design measures such as Flow Acceleration Channels. With its further increased efficiency compared to Noctua's previous 92mm models, it contributes significantly to the superior cooling performance of the NH-D9DX i4.PWM support and low-noise adapterThe NF-A9 92mm fan of the NH-D9DX i4 supports PWM for convenient, fully automatic speed control via the mainboard. In addition, the supplied low-noise adapter can reduce the maximum speed from 2000 to 1550rpm, in order to enable even quieter operation.Optional double fan operationThe NH-D9DX i4 comes with an additional pair of fan brackets. Thus, a second, optionally available NF-A9 fan can be mounted on the front side of the cooler, in order to achieve an even better cooling performance. With the Y-cable supplied with the optional NF-A9 PWM, both fans can be operated and controlled on a motherboard connection.**SecuFirm2⢠Mounting systemNoctuas SecuFirm2⢠assembly systems have become synonymous with quality, reliability and user-friendliness. The D9DX i4⢠system of the NH-SecuFirm2 supports the Intel Xeon platforms LGA2011 (Square and Narrow ILM), LGA2066, LGA1356 and LGA1366 and offers perfect contact pressure and maximum mounting comfort on all sockets.NT-H1 thermal compoundNoctuas NT-H1 is a proven TIM solution recommended by more than 100 hardware journalists around the world, combining minimal thermal resistance with excellent ease of use and excellent long-term stability.This text is machine translated.