1U chassis for motherboard support size of E-ATX 12"x13", 13.38"x 13.4". Optimized for X11 WIO (W series) motherboards 10 x 2.5" hot-swap SAS/SATA drive bay 10-port 1U SAS3 12Gbps Hybrid backplane, support up to 8x 2.5-inch SAS3/SATA3 HDD/SSD and 2x SAS3/SATA3/NVMe Storage Devices 1U Redundant 700/750W Single Output Power Supply Platinum level, 54.5mm width 2 full height expansion slot(s) , 1 low-profile expansion slot(s) 4 x 40x56mm counter-rotation PWM fan(s) Optional 2 x fans for AOC cooling