1U 4x3.5 Hotswap SAS SATA 500W ATX BrownBox Chassis for Motherboard If you are a gadget lover, our Electronics catalog is your dream destination. Choose from hundreds of gadgets and accessories to suit different uses and add some entertainment, facility and convenience to your life. Specifications. U Size 1U. Expansion Slots 1. Motherboard Formats Support ATX. Motherboard Size Support 9.6 x 9.6, 12 x 10. Redundant Power Supply No. Power Supply Power 500W. Power Supply Type AC. Weight 31 lbs