computer case expansion clots external 5.25'' drive bays external 3.5'' drive bays 4fans ports +2front usb port+2 fr 1. ... , dual-core cup4. support Intel ,AMDATI, NVIDIA ,VIA SIS , a series of mainboard5. support Nvidia AMD/ATI high end graphics cards6 ... . six protect function OVP,UVP OLP SCP anti-lightning protection computer case