Noctua\'s DX series has become a standard solution for quiet high-performance cooling in the Xeon range. The latest i4 revision supports LGA2011 (both Square ILM and Narrow ILM), LGA2066, LGA1356 and LGA1366 based Intel Xeon systems, and the 9 cm model NH-U9DX i4 comes with two of the award-winning NF-B9 Premium PWM-rated fans automatic speed control delivered. This cooler is only compatible with 1366/1356 motherboards when using the optional Xeon backplate. Technical details:- Dimensions: 95 x 125 x 95/120 mm (W x H x D)- Material: nickel-plated copper, aluminum (lamellae)- Weight: approx. 550/640 g- Heatpipes: 4x- Fan: 2x 92mm NF-B9 PWM - Standard: 17.6, dB (A), 1600 rpm, 64.3 m3 / h - LNA: 13.1, dB (A), 1300 rpm, 52.6 m / h - Power consumption: 0.96 W - Operating voltage: 12 V - MTBF:> 150,000 hCompatibility: Intel Socket 2011, 2011-V3, 2066 (LGA 1356/1366 with optional Xeon backplate)Manufacturer\'s warranty: 6 years