Gigabyte send over pictures of four X79 motherboard that are on display at Intel's IDF in San Francisco, you can check out the images over here.
Starting at the top we have the G1.Assassin 2 X79 and the biggest surprise here really is the re-designed heatsinks which are much less in your face than the current models. That said, Gigabyte might very well change this before the board is launching, but we'll just have to wait and see if we'll get a gun themed heatsink or not on the final boards.
Expected features include a Killer NIC, Creative X-Fi audio and 3-way SLI and CrossFireX support. We also spotted a Marvell controller for a pair of eSATAp (eSATA/USB combo) ports and a Fresco Logic USB 3.0 host controller on the board.
One feature we couldn't figure out what it's for is the blue and green button on the rear below the 4GHz overclock button, although it could be some kind of BIOS switch to select between the primary and secondary BIOS.