nAsus Prime X299-A II Desktop Motherboard – Intel X299 Chipset – Socket R4 LGA-2066 – Intel Optane Memory Ready – ATX – 256 GB DDR4 SDRAM Maximum RAM – UDIMM. DIMM – 8 x Memory Slots – Gigabit Ethernet – 8 x SATA Interfaces 12 IR3555 POWERSTAGES DDR4 4266MHZ