> so long as the motherboard does, too (like all ASRock that I've seen).
I built a home server last year with an ASRock X570M Pro4 [0] with a Ryzen 4750 PRO (which I had to source OEM from Aliexpress as it's not sold direct). I'm not sure what's the current situation, but the only RAM I could find for it was the Kingston Server Premier KSM32ED8 [1], and the ECC premium was not fun to pay.