The NH-U12DX forms a complete premium quality package that provides outstanding quiet cooling performance for Intel Xeon workstations and servers. The new SecuFirm2 mounting system for socket 771 is highly convenient and makes the NH-U12DX a tailor-made drop-in replacement for standard Intel coolers. To make your Xeon systems quieter has never been so easy! The NH-U12DX's fin shape has been modified so that two coolers form an air duct on Dual Xeon setups, producing superior cooling performance at very low noise levels. The new SecuFirm2 mounting system (for socket 771 and 604) ensures maximum convenience and extremely short installation time. The SecuFirm2 is fully compatible with the original Intel installation system so that the NH-U12DX works as a simple drop-in replacement. This cooler features Noctua's premium-grade SSO-bearing, award-winning NF-P12 fan which is renowned for its exceptional quietness and long-term stability. The NH-U12DX also comes with Noctua's much-acclaimed NT-H1 pro-grade TIM solution that provides minimum thermal resistance, excellent ease-of-use and outstanding reliability.