Noctua Nh-D9 Dx-3647

Noctua's DX series CPU coolers have been the top choice for quiet premium cooling solutions for Intel Xeon processors for years. The NH-D9 DX-3647 4U features a larger, specially adapted contact surface and supports LGA3647 platforms in both square and narrow designs. With its 92mm heatsink based on the proven NH-D9L and two award-winning, PWM-controlled NF-A9 92mm fans (high-performance version with 2500rpm), it combines strong cooling performance and excellent compatibility—perfect for 4U systems and other applications with limited space. The high-quality overall package of the NH-D9 DX-3647 4U is completed by the professional SecuFirm2™ mounting system and the pre-applied NT-H1 thermal paste—a true premium solution for quiet cooling of LGA3647-based Xeon workstations and servers.

The DX series for Intel Xeon has become an established reference for quiet, high-quality air coolers for Intel Xeon processors. Thanks to their superior acoustic efficiency, they are ideal for workstations and servers in noise-sensitive environments.

The new DX-3647 models are dedicated, customized solutions for Intel's professional LGA3647 platform: perfect for Skylake-SP based Xeon Scalable CPUs and Xeon-Phi processors.

The full copper contact surface of the DX-3647 version is 70x56mm, more than twice the size of that of the standard model. It has been specifically adapted for the oversized heat spreaders of Intel's LGA3647-based processors, allowing for optimal heat transfer from the CPU to the cooler socket and further through the heat pipes to the cooling fins.