Answer

Please install memory module on DIMMA2 first, for 2 DIMM configuration, please install on DIMMA2 & DIMMB2 slots first.

Models

PRO Z890-P WIFI, MPG Z890 CARBON WIFI, MPG Z890 EDGE TI WIFI, MAG Z890 TOMAHAWK WIFI, MEG Z890 UNIFY-X, PRO Z890-A WIFI, Z890 GAMING PLUS WIFI, MEG Z890 ACE, MEG Z890 GODLIKE, MPG Z890I EDGE TI WIFI, PRO Z890-S WIFI