Literally first Asrock motherboard I happened to click on has it listed as a feature: https://www.asrock.com/mb/AMD/X870%20Taichi%20Creator/index.asp#Specifica

Literally first Asrock motherboard I happened to click on has it listed as a feature: https://www.asrock.com/mb/AMD/X870%20Taichi%20Creator/index.asp#Specification https://www.asrock.com/mb/AMD/X870%20Taichi%20Creator/index.... Asus has options as well such as https://www.asus.com/motherboards-components/motherboards/proart/proart-x870e-creator-wifi/techspec/ https://www.asus.com/motherboards-components/motherboards/pr... I think it was more rare when AM5 first came out, there were a bunch of ECC supported consumer boards for AM4 and threadripper.