Zalman HD503, HTPC, PC, Black, ATX, micro ATX, Aluminium, Plastic, Steel, 2x 120 mm Zalman HD503. Form factor: HTPC, Type: PC, Product colour: Black. Side fans installed: 2x 120 mm, Side fans diameters supported: 120 mm, Rear fans installed: 2x 80 mm. Width: 450 mm, Depth: 455 mm, Height: 170 mm. Power supply type: ATX12V, Dimensions (WxDxH): 450 x 455 x 170 mm, Internal drive bays: 3.5" x 3