I have…
* AMD Ryzen 7 PRO 5750GE
* 128GB ECC DDR4-3200
* Intel XL710-QDA2 (using QSFP+ to a quad-SFP+ passive DAC breakout)
* LSI 9500-16i
* Eight WD 16TB HDDs (shucked)
* Two 2TB SK Hynix P41 Platinum M.2 NVMe SSD
* Two Samsung 3.84TB PM9A3 U.2 NVMe SSD
* Two Samsung 960GB PM893 SATA SSD
So that’s the gist. Has a BMC, but dual 40GbE and can sustain about 55GbE over the network (in certain scenarios, 30-35GbE for almost all), running TrueNAS scale purely as a storage appliance for video editing, a Proxmox cluster (on 1L SFFs with 5750GEs and 10GbE idling at 10W each!) mostly running Apache Spark, a Pi4B 8Gb k3s cluster and lots more. Most of what talks to it is either 40GbE or 10GbE.
There is storage tiering set up so the disks are very rarely hit, so they’re asleep most of the time. It mostly is serving data to or from the U.2s, shuffling it around automatically later on. The SATA SSDs are just metadata. It actually boots off a SuperMicro SuperDOM.
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The Zen 3 Ryzen PRO 5750GEs are unicorns, but super low power. Very tiny idle (they’re laptop cores), integrated GPU, ECC support, and the memory protection features of EPYC. 92% of the performance of a 5800X, but all 8C/16T flat out (at 3.95GHz because of an undervolt) caps at just under 39W package power.
The LSI 9500-16i gave me all the lanes I needed (8 PCIe, 16 SlimSAS) for the two enterprise U.2 and 8 HDDs, and was very low idle power by being a newer adapter.
The Intel dual QSFP+ NIC was deliberate as using passive DACs over copper saved 4-5W per port (8 at the aggregation switch) between the NIC and the switch. Yes, really. Plus lower latency (than even fiber) which matters at these transfer speeds.
The “pig” is honestly the ASRock X570D4U because the BMC is 3.2W on its own, and X570 is a bit power hungry itself. But all in all, the whole system idles at 50W, is usually 75-80W under most loads, but can theoretically peak probably around 180-190W if everything was going flat out. It uses EVERY single PCIe lane available from the chipset and CPU to its fullest! Very specific chassis fan choices and Noctua low profile cooler in a super short depth 2U chassis. I’ve never heard it make a peep, disks aside :)