This product is either discontinued or we cannot get that from suppliers.
Noctua NH-U12DX-1366, SSO-Bearing, Blade Design, Rotational speed (+/- 10%) 1300 RPM, Airflow 92,3 m³/h, Acoustical noise 19,8 dB(A), Voltage range 12 V, MTTF > 150.000 h.
The Noctua NH-U12DX 1366 CPU Cooler is made to offer a high-end method for providing exceptionally quiet cooling performance for Intel's LGA1366 Xeon 5500 CPUs. Designed with the SecuFirm2™ mounting system for socket U12DX-1366.