- 2U chassis supports for maximum motherboard sizes - SMC Proprietary WIO, 12.8" x 13.4" motherboards - 3 x 3.5" hot-swap SAS/SATA drive bay with SGPIO, optional 2 x 2.5" hot-swap SAS/SATA drive bay w/ full SES-II support on SAS motherboards - 3-port SC825M SAS3 12Gbps TQ backplane, support up to 3x 3.5-inch SAS3/SATA3 HDD/SSD - 1U 800W Redundant Power Supply 76mm width, W/PMbus, Titanium - 4 full height expansion slot(s) (Riser Card Required), 3 low-profile expansion slot(s) (Riser Card Required) - 4 x 4cm high-performance counter-rotating PWM fan(s) with optimal fan(s) speed control - Optional 1 x 4cm high-performance counter-rotating PWM fan(s) with optimal fan(s) speed control