iStarUSA RM D-313SE-MATX-BLUE Compact 3U microATX 5.25X2 PS2 Power Supply Uni Form Factor: 3U Bezel Type: Standard Front Bezel Color: Blue Chassis Material: Steel Hotswap HDD Interface: Drive Bays: External 5.25" Drive x 2 / External 3.5" Drive x 1 / Internal 3.5" Drive x 4 Motherboard Size: 9.6 x 9.6 (microATX) Expansion Slots: 4 Cooling Fan: Optional Fan: 120mm x1 80mm x1 60mm x2