Intel Z390 Supports 9th/8th Gen Intel Core / Pentium Gold / Celeron processors for LGA 1151 socket * Not backward compatible with older generation of LGA 1151 CPUs DDR4 4400(OC)/ 4300(OC)/ 4266(OC)/ 4200(OC)/ 4133(OC)/ 4000(OC)/ 3866(OC)/ 3733(OC)/ 3600(OC)/ 3466(OC)/ 3400(OC)/ 3333(OC)/ 3300(OC)/ 3200(OC)/ 3000(OC)/ 2800(OC)/ 2666/ 2400/ 2133