More efficient use of space compared to my current silent mini-home lab -- also about 2U worth of space, but stacked semi-vertically [1].
That's 4 servers each with AMD 5950x, 128GB ECC, 2TB NVMe, 2x8TB SSD (64c/512GB/72TB total).
The rest of the components are:
Board: AsRock Rack X570D4I-2T (2x 10GBe and IPMI!)
NVMe: 2TB Transcend TS2TMTE220S TLC
SSD: 2x 8TB Samsung 870 QVO
PSU: Seasonic SSP-300SUB (overkill, went for longevity)
CPU Cooling: Thermalright AXP-100 Series All-Copper Heatsink with Noctua NF-A12x15 PWM
Exhaust fans: 2x INEX AK-FN076 Slimfan 80mm PWM
On the air intake side, there's a filter sheet that I replace (or vacuum) once in a blue moon - the insides are still pristine after running for over a year now.
Interesting thing about cooling: one of those cases has a PSU with custom made cabling (reduced cables by about 90%). I was hoping it will reduce the temperatures a bit. Surprisingly there was basically no change. At full load all keep running at around 70 celsius.
Important: in such a small case, if you want silence you'd better disable AMD's "Core Performance Boost". This will make the CPU run at its nominal frequency, 3.4GHz for 5950x, otherwise it'll keep on jumping to it's max potential, 4.9GHz for 5950x, which will result in more heat, and more fan noise.