Hello, according to the user manual :
ryzen processor (pinnacle ridge) ECC compatible and not ECC 3220+(OC)/2933/2667/2400/2133
ryzen processor (summit ridge) ECC-enabled and not ECC-enabled 3220+(OC)/2933(OC)/2667/2400/2133
ryzen processor (raven ridge) non-ECC 3220+(OC)/2933(OC)/2667/2400/2133)
on ryzen (raven ridge) processors ECC is only supported with PRO processors
for more info see https://www.asrock.com Tchuss!!!