A computing device includes a chassis, a motherboard, a mounting plate, and a disk drive module attached to the mounting plate. The chassis includes a base panel and a pair of side panels connected to opposite sides of the base panel. The motherboard is mounted on the base panel. The mounting plate is secured to the pair of side panels and is inclined at an angle relative to the base panel. The disk drive module is inclined at the same angle as the mounting plate. At least one expansion card is attached substantially perpendicular to the motherboard. The disk drive module includes a first end and a second end opposite to the first end. The first end is located higher than a top edge of the at least one expansion card. The second end is located lower than the at least one the expansion card.