1U, support size ATX 12" x 10" and Micro ATX 9.6" x 9.6"., 4 x 3.5" hot-swap SAS/SATA, 1U 4-Port 12Gbps Backplane Support 4x3.5, 1U 400W Redundant Power Supply Platinum with PMBUS, W54.5xL220xH40mm, 1 full height expansion slot(s), 4 x 40x28mm PWM fan(s)