Working our way down the Maximus IV Extreme, we find four PCIe x16 slots, a single PCIe X1 slot and a single PCIe X4 slot. The PCIe slots work in a single @X16, dual @X8 or triple @X8 configuration. The CMOS battery is located between the top two X16 slots. Across the bottom of the board we find the following connectors: a secondary 4-pin Molex connector, front panel audio connector, two 4-pin connectors, four sets of USB 2.0 front panel connectors, front panel system connectors, a clear RTC (Real Time Clock) RAM jumper and a BIOS switch. The board features two BIOS and this button allows you to switch between the two. A nearby LED designates which BIOS you are actively using.
Along the right side of the board are eight SATA right-angle connectors. The bottom four are dark grey in color which represents SATA 3Gb/sec transfer speeds. The bottom pair of red connectors are SATA 6Gb/sec and are controlled by the Intel P67 chipset (as are all of the grey connectors). The uppermost red connectors are Marvell-controlled SATA 6Gb/sec ports.
Rear panel I/O connectors, from left to right include: combo PS/2 and keyboard port, two USB 3.0 ports, clear CMOS switch, optical S/PDIF out port, two more USB 3.0 ports, two external SATA ports, Intel LAN port, two more USB 3.0 ports, ROG Connect switch, ROG Connect port, another Intel NIC, two additional USB 3.0 ports and audio I/O ports. As you can see, there are more than enough connectors for virtually every scenario. Additionally, ASUS has gone the extra mile by making every USB port 3.0 compatible.
On the back of the board we can see backplates used for the heatsinks on the other side. Hopefully these won't interfere with the backplate for the water kit that we plan to use with this board.
Hardware installation is on the next page.