Supermicro 200-Watt Mini 1U Rackmount Server Chassis, Black CSE-510L-200B Compact 1U Server, Appliance Chassis 200W Low Noise Power Supply 1x 3.5" Internal Drive Bay OR Up to 4x 2.5" Internal Drive Bays OR 1x Full-height, Half-length PCI Expansion Slot (Optional)(Optional) OR up to 2x 2.5" (with single retention bracket) and 1x FH, HL PCi