SupermicroM11SDV-8C+-LN4F Mini-ITX Motherboard with EPYC™ 3251 SoC Processor

I set out to build a home lab server using Proxmox and this board ticked most if not all the boxes for me.Pros:- ITX form factor with 4x RAM slots (most have 2x RAM slots) and ECC support.- Epyc 3251 is 8c/16t while remaining relatively low power usage. 55w TDP is pretty low considering what it is.- Built in 4 port Intel i350 1Gbe NIC built in. This is a huge benefit. Plenty of NIC ports, no need to waste a PCIe slot on a 4 port NIC.- ATX power supply support.- Management interface offers essentials without needing a licence. Able to HTML5 KVM over LAN to the server. Licence is $30 and basically adds the ability to update firmware using IPMI. Very reasonably priced, process seems confusing and I decided the effort was not worth it (I'd gladly hand over $30 if the process was easier).- PCIe x16 slot supports bifurcation meaning with a riser card you could potentially ad multiple cards to the single slot on the motherboard. Have not used this yet but a great feature should I later want to more than the LSI SAS HBA 9207-8i controller card I currently have installed, like a 10Gb NIC down the road.Cons:- Only RGB video out. ~$12 RGB to HDMI adapter solved the matter making it easier to use with a monitor/TV when needed (really just initial setup).- Limited to 2x USB 3 ports on the back and no USB 3 motherboard headers, looks like 2-3 USB 2 headers (for things like front USB ports on the case). 4x ports on the back and/or 1x USB 3.0 headers would have been a welcome addition.- Management interface gets the job done, but its not intuitive to use and could be better organized.- Supports PWM fans, but instead of having fan curves or being able to set speeds based on CPU/sys temp it has ~5 fan presets with names that dont really explain what each does. The presets apply to the CPU AND case fans, no independent control. Since I got nice Be Quiet! PWM case fans that operate at virtually inaudibly it would have been nice to increase thier speed while reducing the CPU fan speed...- CPU fan is extremely loud. Of the ~5 above mentioned presets, there was only one in which the CPU fan noise was reduced to being inaudible at idle and being an acceptable level of noise.I have the latest Proxmox up and running. pfSense is installed as a VM and is used as my router with WAN going straight to a NIC port on this board and LAN outgoing from another port to a Unifi switch which leads to a Unifi nanoHD AP. Unifi controller running as a CT. Works very well.I am very impressed by the CPU performance. Its very snappy, load is next to nothing with a few VM's/CT's running (granted nothing pegging the CPU) and the temps stay very low.So far has been perfectly stable, came with the latest firmware for BIOS and IPMI out-of-the-box and was easy to get setup and running.I am using a Seasonic Focus Gold 650w ATX PSU with this. It wasnt obvious so I will mention here...if using an ATX PSU you use both the included 24 pin to 4 pin adapter AND 8 pin CPU PSU ports.I like that despite the small footprint I have plenty of CPU horsepower, room to expand past the 2x 32GB ECC 2666Mhz RAM sticks (being as I have 2 free slots), the ability to add another PCIe card should I get a riser and use bifurcation and have all the other features built in without many real tradeoffs.Despite the cons, they are basically all acceptable matters.The price may seem high, but comparing apples to apples, its a bargain. Getting a modern 8c/16t CPU, motherboard supporting ECC RAM and a 4x port (legitimate) Intel i350 NIC for ~$700 would be difficult to find outside of this.Looking forward to building out my VM's/CT's more and expect this to serve my needs for many years to come. For those looking to whitebox a homelab and aiming for ITX size, I highly recommend this board.

Received a bad board that was a few years old. Returned it for a full refund and bought from somewhere else. The new one has been solid and running great. 3-stars just for my first bad experience with a deffective unit.

For it's size it performs VERY well.Supermicro does not build a chassis specifically for this motherboard. It is a mini ITX motherboard but will fit in most ATX chassis'I went from a 2758C 8 core atom cpu to this, modified a 1u to accommodate the CPU fan but the hardest part was the short atx power supply adapter. Without enough room on top of the motherboard or to the side where the power sockets are at it will be difficult to find proper placement for the power adapter. Being 2 to 4 inches longer could help.In my case I had to rig the fans in the chassis just right to make room.Over all I am satisfied.It is being used for a firewall with 1.4Gbps worth of internet coming in and this thing doesn't hardly break a sweat.It idles at about 22 to 24C and runs at about 24 to 28C. Full load doesn't break out of the 30'sC.

Works like a charm! Running it as an ESXi host (7.0, Update 2a) and it's been mostly stable. The only downside is that the onboard fan controller throws a fit if the fans attached don't spin faster than 1700RPM. It's like it expects to have small, high-RPM fans instead of big slow ones, and there's nothing you can do to adjust it.

I used this in a Supermicro SuperChassis CSE-721TQ-350B2 - which is about as compact as you can fit a mini itx board and 4x hot swap 3.5" drives in a mini tower. The SuperChassis power supply is flex atx and did not have the ATX12V plug for this motherboard, so had to swap that. With 2x 32gb samsung sticks of memory, running proxmox and multiple VMs (like win11 with blue iris), containers and services for house, and room to experiment still. Some quirks of note:- If you care about the MT/s speed of your ram being as high as it can, only use 2 sticks of ram. If all 4 are filled, depending on the type of ram, speeds can drop from 2666MT/s to 2133 or 1866MT/s. Something about the AMD memory controller limitations. I used 2666MT/s, and forced that speed in bios with no probs.- Fan control on supermicro is annoying. The BMC / bios has 5 settings, that boil down to jet engine loud full speed, or quiet and slow, with not much difference. I set it to 'optimal' so CPU is fine, and the case fan I removed the 4th PWM wire so it runs full speed all the time - it isn't that loud.- Would be nice to see 2.5gbit networking, but multiple gigabit is OK for now, and there is always that 16x pcie for expansion.- Check that your power supply has the ATX12V connector! One power supply I tested with had EPS12V which supposedly is the same but didn't work. BMC would power on from the 24pin->4 pin adapter but not power on the system. Your mileage may vary.