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What is the difference between LGA2011 Narrow ILM and LGA2011 Square ILM?

There are two different types of ILM (Independent Loading Mechanism) for Intel’s LGA2011 based Xeon CPUs: Square ILM with 80x80mm hole spacing and Narrow ILM with 56x94mm hole spacing.

Illustration showing Square and Narrow ILM for LGA2011 socket. Sqaure ILM has the mounting points centered around the CPU socket with 80mm spacing horizontally and vertically; Narrow ILM has 56mm horizontal and 94mm vertical spacing and the mounting points sit above and below the CPU

 The mounting system of the NH-U12DX i4/NH-D9DX i4 3U/NH-U9DX i4 is fully compatible with both types.

These coolers can be made compatible with LGA2011 Narrow ILM with additional mounting parts:

  • NH-C14
  • NH-C14S 
  • NH-D9DX i4 3U
  • NH-D9L (chromax.black)
  • NH-U12DX i4
  • NH-U12S (chromax.black/ SE-AM4)
  • NH-U9DX i4

The additional mounting parts needed can be requested free-of-charge via this order form on our website.

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