Am4 motherboard with rs232 serial?

Hey all, I’m working on putting together a build to replace a computer in our barn. It runs a pair of Lely milking robots, and needs a serial port to interface with a DRM dongle (yes really) I am hoping to go for a ryzen APU.

Also interested in suggestions for a case that has really good dust filters. Or I might build a wooden box for the computer, and put a furnace filter on it. Working conditions shown in my post history if you’re interested.
TIA,
Andrew.

Something like this?

ASRock iBox

A lot of ASRock mainboards (for example: B450M Pro4) have a port labeled “COM 1”

Then it is just a mater of screwing in a slot cover like this:

and pluggin the cable to the board.

RS-232 will never die…

Edit: The ASRock X570 Phantom Gaming4 also has a Thunderbolt AIC connector along side the COM, just in case someone needs both from a 16c/32t system running PCIe Gen4 devices…

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I’m looking for quad-core with SMT. Current system is a i5 4670. Should be at least faster than that.

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