Lian Li PC-7 Plus Black Aluminum ATX Mid Tower Computer Case The all-aluminum LIAN LI PC-7B plus II reaches the balance between chassis stiffness and heat dissipation. Featuring four external 5.25" drive bays, and five 3.5 drive bays (two external and three internal), the LIAN LI PC-7B plus II provides great expandability. The LIAN LI PC-7B plus II features two 120mm fans, one in the front and one at the rear, for efficient ventilation and effective system cooling. The convenient front I/O panel enables easy access to two USB 2.0 ports, one IEEE 1394 port and two audio ports.