i3-10100 Build

[Gauss23]

Because Supermicro was already mentioned here in this thread. I'm currently thinking about a built with this board:
M11SDV-4CT-LN4F https://www.supermicro.com/en/products/motherboard/M11SDV-4CT-LN4F

They have it with different AMD EPYC CPUs (3101, 3151, 3201 and 3251). Prices in Germany seem to range from 400 to 650 Euro depending on the CPU you want to use. They are passively cooled (the 3251 is also available with a fan mounted) but I think it needs some airflow to get rid of the heat.

Combined with a case like that https://www.supermicro.com/en/products/chassis/1U/E300/SCE300 if rackmount is needed or any other mini-itx case on the market, 8-xGB ECC Ram, an NVM-E SSD and a power supply, you should have a powerful Firewall box for 650-1000 Euro with IPMI.

[rungekutta]

Been looking at that too and looks ideal in many way. What puts me off is the many reports on the internet of that case being very loud (small but high rpm fans). Never seen or heard one myself though.

Personally I've boiled it down to either one of those Supermicro AMD embedded but in a non-Supermicro (quiet) case mini itx case - or a small form factor business PC with PCIe nic added.

Haven't pulled the trigger on either yet though.

[Gauss23]

I think the Supermicro case is only useful for rackmount-installations. Usually no one cares about noise in when running in a rack.
There are a lot of Mini-ITX cases around. I like for example the Thermaltake Core V1 with its huge fan in the front. Really quiet but not the smallest possible case.
There are even passively cooled mini itx cases on the market and with the option of putting the power adapter externally, you gain some free air in the case. The only thing that's missing is native redundant power supply support but there are redundant atx power supplies around to fix that (around 300€).

[rungekutta]

Thermaltake Core V1 looks solid but it's massive. Cooler Master Elite 110 looks really good I think. 120 or 140mm fan at front and optional 2x 80mm on the side. That must be enough for the passive heatsink on the AMD CPU, and can get quality fans to taste and budget to keep the noise down.