Noctua company introduced a CPU cooling system NH-U12DX i4 and NH-U9DX i4, designed for Intel Xeon processors, used in workstations and servers. This product is compatible with processors LGA2011 (Square and Narrow ILM), LGA1356 and LGA1366. The package includes corresponding fixture SecuFirm2 and thermal compound Noctua NT-H1.
Coolers are equipped with fans, their speed is controlled by PWM. Model NH-U12DX i4 got one fan NF-F12 size 120 mm, Model NH-U9DX i4 - two 92-mm fans NF-B9.
To reduce noise on the power supply fan can be installed through a step-down adapter. Speed of NF-F12 varies 300-1500 r / min (300-1200 r / min ). Maximum air flow is 93.4 m 3 / h (74.3 m 3/ h during an adapter), the noise level - 22.4 dBA (18 dBA).
Speed of NF-B9 varies 300-1600 r / min (300-1300 r / min ). Maximum air flow is 64.3 m 3 / h (52.6 m 3 / h during an adapter), the noise level - 17.6 dBA (13.1 dBA).
The small size of the radiator NH-U12DX i4, providing easy access to the memory slots. Dimensions without fan are 158 x 125 x 45 mm. With fan, they increase to 158 x 125 x 71 mm. Weight without fan and with a fan of 580 and 755 g, respectively.
Dimensions of NH-U9DX i4 without fans are 125 x 95 x 71 mm. Installation of one fan increases to 125 x 95 x 95 mm, two - up to 125 x 95 x 120 mm.
Price of NH-U9DX i4 is 60 euros, NH-U12DX i4 - 70 euros.