Since this seems to be a recurring question I thought I'd share my experience getting coolers for a narrow ILM SM X10DRH-iT.
I saw the post earlier in this thread talking abut the Dell 0YR2H3 coolers from the Precision workstation line. Inexpensive and effective. Seemed like a fine idea to me so I ordered a couple. Once they arrived I mounted them to the motherboard, and this is where the fun began. Long story short the base of the cooler never contacted the CPU. Here's why. The screws on the Dell cooler look like this:
Note the length of the threads. If you look at the SM SNK-P0050AP4, this is what you see:
The screws are WAY shorter. The Dell screws were bottoming out in the threads of the backplate before the cooler got to the CPU.
So I had one of two choices:
1) cut the threaded portion of the Dell cooler short and see how that worked
2) something else
I went the something else route. The screws in the Dell cooler are captured with an E-clip. I removed that allowing me to remove the screw and the spring from the cooler. I then hit the hardware store and got 4mmx25mm machine screws and appropriate washers. I then used screw-> washer->spring-> washer for mounting. It looks like this when mounted:
It holds 100% fine, however it is very, VERY fiddly getting everything aligned and in position as the cooler wants to skate around on the nice slippery thermal paste. Having a second set of hands to steady the cooler very much helps. And, I was doing this in the case, which also didn't help. But, it worked out fine. My idle temps are 28C and 33C for the two CPUs and under full core load from stress-ng 55C-65C even after an hour. I'm pretty happy with the result since these two coolers shipped cost < $25 plus a few bucks in hardware. Half of me wishes I had gone the first route first and see if it worked but, oh well.
Here's how they look in the case:
One other thing I had to do on the right cooler...had to remove the black metal shroud and reorient the lead wire to the opposite side so it would be able to attach to one of the rear CPU zone fan headers. Also, regarding the fan headers/connector. I did reorient the pins in the stock 5 pin Dell connector properly for the standard 4 pin PWM header. That also seemed to work just fine.
The case is a Corsair Carbide Air 540 High Airflow dual chamber cube case. I had to drill holes for the motherboard standoffs that I attached with a nut from the back side. You'll note there is no screw on the bottom right standoff hole. That one is positioned over a cable passthrough in the case. Fortunately no stress gets put in that area. It's a tight fit, so tight I had to use 15mm slim 120mm fans in the front to prevent blocking the rightmost RAM latches. The rest of the build is 2 x E5-2697A CPUs, 256GB ECC, and I have 2x200GB Intel DC S3700 enterprise SATA SSDs coming for the Proxmox boot drives (ZFS mirror) and two Intel 1.6TB DC S3605 AIC enterprise NVMe SSD for VM storage (also ZFS mirror). 1200W PSU. I was really hesitant to try a modded BIOS to be able to boot from NVMe, so this was my solution. The two WD HDDs in the pic are just for some weight in the bottom for now. I've also turned off the onboard 10G NIC because 1) it generates a lot of heat and 2) I'm very pedestrian and only have gigabit networking. Yeah, I know, poor excuse for a homelabber.
I've been booting from an Ubuntu stick to get the fan thresholds all worked out before my permanant storage gets here. Also need some sort of single slot, full height GPU for a bit of passthrough. Still trying to figure that out.
It's been a satisfying build, needed some tinkering (what would one expect mating parts from one proprietary vendor to another proprietary vendor?!), but has worked out in the end. I'm happy with it so far.
