Aopen CASE Slim PC H360B 300W. Power supply: 300 W. Width: 336 mm, Depth: 405 mm, Height: 99 mm. Internal drive bays: 3.5" x 1, External drive bays: 5.25" x 1, 3.5" x 2, Main board size: 243.8 x 243.8 mm (9.6 x 9.6 ")