4. Gen Intel Core ATX, 3 Modules for Additional COM/Parallel Ports, 1 PCIe x16, 1 PCIe x4 (x1 signal), 1 PCIe x1, 4 PCI , 1 Mini PCIe, 2 DDR3 DIMM up to 16GB, 8 USB 2 USB 3.0, 6 USB 2.0 Drive Security