This product is either discontinued or we cannot get that from suppliers.
Noctua D9DX-i43U, Cooler Tower, Heatsink material Copper (base & heatpipes), aluminium (fins), soldered joints & nickel plating, Socket compatibility Intel LGA2011-0 & LGA2011-3 (Square ILM & Narrow ILM), LGA1356 & LGA1366 (with Xeon backplate), Included fan model(s)92mm Noctua NF-A9 PWM.
Noctua's DX line of coolers has become a default choice in high performance quiet cooling solutions for Intel Xeon CPUs. The i4 revision supports LGA2011 (both Square ILM and Narrow ILM), LGA1356 and LGA1366 based Xeon platforms.