Intel Z390 Supports 9th and 8th Gen Intel Core Processors (Socket 1151) * Not backward compatible with older generation of LGA 1151 CPUs Supports DDR4 4300+(OC)*/ 4133(OC)/ 4000(OC)/ 3866(OC)/ 3800(OC)/ 3733(OC)/ 3600(OC)/ 3200(OC)/ 2933(OC)/ 2800(OC)/ 2666/ 2400/ 2133 non-ECC,un-buffered memory