Starting with the left side of the PCB, we have the I/O panel that includes much of the board's connectivity. This board's I/O panel is pretty stacked, with 10 USB ports, 2 eSATA ports, 2 IEEE 1394 ports, 1 PS2 port that can be used for a keyboard or mouse, 8-channel HD audio, 2 Gigabit LAN ports that support teaming, and both Optical and Coaxial digital audio outputs. Moving down the board are the expansion slots. There are a total of 3 PCIe 1x slots and 2 16x slots, which support both Crossfire and SLI and run at 8x when both are populated, as well as 2 PCI slots. In front of the orange 16x slot, you can see the CD and SPDIF input headers.



Link: Overclockersclub