2U, 13.68" x 13", E-ATX 12" x 13", ATX 12" x 10" motherboards, 8 x 3.5" hot-swap SAS3/SATA drive bay, 2 x 3.5" fixed drive bay, 8-port 2U SAS3 12Gbps TQ backplane, support up to 8x 3.5-inch SAS3/SATA3 HDD/SSD, 1U 600W platinum efficiency multiple output power supply w/PMBus, 7 low-profile expansion slot(s), 3 x 8cm (7000 RPM) hot-swap PWM cooling fan(s)