The UD5 targets premium users, with eight DDR3 DIMM slots, geared for 3-card SLI/CrossFire, while the UD7 is bleeding-edge with just four DDR3 DIMM slots, but a wealth of overclocking features and support for 4-card SLI/Crossfire. Then there's the G1.Assassin 2, which targets the gamer-overclocker market with neat features such as hardware-accelerated Creative X-Fi audio and Bigfoot Killer NIC, with support for 3-card SLI/Crossfire.
The GA-X79-UD5 features a generous 14-phase CPU VRM. The LGA2011 socket is wired to eight DIMM slots, four on either side, supporting up to 64 GB of quad-channel DDR3 memory. Expansion slots include three PCI-Express 3.0 x16 (x16/x8/x8 or x16/NC/x16), two PCI-Express 3.0 x1, and a legacy PCI. There are 12 SATA ports. It's likely that Gigabyte used third-party controllers over what the PCH offers. There could be as many as six 6 Gb/s ports. The rest of the connectivity is pretty standard stuff: 8-channel HD audio, one gigabit Ethernet, four USB 3.0 ports, and power-eSATA.
The GA-X79-UD7 sees a fusion between the traditional high-end connectivity and features of UD7, and the new "Gigabyte OC" line the company released with its X58A-OC motherboard. It keeps up with the black+orange color scheme. There are just the four DDR3 DIMM slots that can hold up to 32 GB of quad-channel memory, but PCB real-estate is allotted to a strong 22-phase CPU VRM, 6-phase memory VRM, and only those features that will help overclockers a big way. This board features four PCI-Express 3.0 x16 slots (x16/NC/x16/NC or x8/x8/x8/x8), 14 SATA ports, and high-grade connectivity. Apart from the 24-pin ATX connector, the board draws power from two 8-pin EPS connectors, and two SATA power inputs.
Lastly, the G1.Assassin 2 keeps up with the catchy new lineup Gigabyte built with X58 and Z68 chipset-based platforms. This board features just four DDR3 DIMM slots, but the space saved is used for bleeding-edge connectivity features that help gamers. First, there's a Bigfoot Killer NIC PCI-Express hardware-accelerated network controller, then there's a Creative Sound Blaster X-Fi hardware-accelerated audio processor (CA-20K2), with its own set of audiophile-grade capacitors to the OPAMP circuit. The board features three PCI-Express 3.0 slots (x16/NC/x16 or x16/x8/x8), 12 SATA ports, and a wealth of other connectivity.