Asus Barebone System - Intel C422 Chipset - Socket R4 LGA-2066 - 1 x Processor Support - 512 GB DDR4 SDRAM DDR4-2666/PC4-21300 Maximum RAM Support - Serial ATA/600 RAID Supported Controller - 6 x Total Bays - 2 5.25" Bay(s) - 3 3.5" Bay(s) - 1 2.5" Bay(s) - 5 x Total Expansion Slots - Processor Support (Xeon) - Gigabit Ethernet - 2 USB 3.0 Port(s) - 1: