Noctua's DX series CPU coolers have been the top choice for quiet premium cooling solutions for Intel Xeon processors for years. The NH-U12S DX-4677 features a larger, specially adapted contact surface for LGA4677. With its proven NH-U12S-based 120mm heatsink and two award-winning, PWM-controlled NF-A12x25 120mm fans, it offers an impressively balanced combination of cooling performance, compatibility, and quiet operation. The NH-U12S DX-4677's overall high-quality package is completed by the professional SecuFirm2 mounting system and pre-applied NT-H1 thermal paste—a true premium solution for quiet cooling of LGA4677-based Xeon workstations and servers. Since 2008, 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.