Dynatron R24 2U CPU Cooler Active for Intel Socket 2011

These look great, take up very little room and are quiet. Does a great job cooling a high end virtualization server.

This cooler is pretty straight forward and works well with narrow ILM configuration except for one condition. If you buy RAM please do not buy "heat spreaders" as they will interfere with this cooler.Pros : This thing pushes a good amount of air for its size and cools well. I have a sandybridge xeon 2670 (courtesy of facebook) which has a TDP of 115W and this cooler keeps it cool while running at or bellow 50% of total speed (~30C @ 20C ambient)Cons: It is not a silent fan, you will hear it, but it is not as loud as it can be, which is server room loud. On load I set my fan to spin at around 80% and its still not super loud inside the 2U chassis. @MAX this thing can be heard outside the room. So don't worry too much about about it screaming near or around 60%.Remarks: If you have to buy a narrow ILM, this cooler will do you, for under 120W TDP, no problems. I use it to cool a 2U RPC 270 system which serves 10Gb ethernet and 802.11AC. It's not a silent fan, but if you have to compromise and get narrow ILM in 2U, this thing does the trick.

Practically silent on a supermicro X9 motherboard. Keeps the cpu cool at idle and load.

If you plan on using this on a closet or server room, then this is for you. Otherwise, stay away from this cpu cooler, since it's really noisy. I end up replacing this cpu cooler with a Noctua NH-U9DX i4. CPU cooler height may restrict you from mounting a better cpu cooler. So if this is your only option, make sure you're placing your computer/server somewhere far from noise level.Also, I don't think you can replace the fan with the off-the-shelf Noctua 60x25mm fan. The bottom mount screws will block the fan. Even if you grind the fan, you can't make it fit. If you plan on replacing the fan, make sure it has ample spacing, like circular fans.