The following is taken from our preview article on the Gigabyte GA-X58A-UD9
Gigabyte has broken its own UD7 nomenclature with an even more feature-packed and extreme flagship X58 board. The new Gigabyte GA-X58A-UD9 is certainly a milestone in terms of its size. It is extra large, with a super-size XL-ATX form factor that's not exactly standard, but one that Gigabyte is embracing for its really high-end models. The extra PCB space allows it to have seven PCIe 2.0 x16 slots and thanks to additional onboard NForce SLI bridge chips, it's a board that can do 4-way SLI or CrossFireX. The dimensions also ensure that there's sufficient space to have dual-slot graphics cards for such a 4-way multi-GPU configuration. The downside is that you'll need a compatible chassis that can house this board (you can find the support list on Gigabyte's website) and that could be a problem for upgraders.
Besides being extra large, Gigabyte has, as usual overdosed on the storage options, though the PCB now allows it to do so without compromising on the layout. While it's still a packed PCB, we didn't find any of the SATA ports getting affected by graphics cards, as they were all aligned outwards. The connectors generally were found at the edges of the board and users should have no issues connecting their cables. We did notice that if you need to install the separate Hybrid Silent-Pipe passive heatsink to the water cooling block, it does take up some space and even block users from easily accessing the extra PCIe power connector nearby. Of course, this would be quite unusual circumstances.
You can also expect the whole list of Gigabyte's in-house technologies to be found in its full glory on this board, including some of the newer ones, like On/Off Charge, which allows the quick charging of iPhone/iPod/iPad devices even while the PC is turned off. The complete list is found on Gigabyte's website but if you're familiar with names like "Ultra Durable 3" and "24-phase VRM power" design, then yes, all these and more are found on this ultimate X58 board from Gigabyte.
Finally, the price for this board can be quite a shock. We were quoted a local retail price of S$839 for this super-size board (it's listed at US$700 on Newegg) so it too is a new high in motherboard prices. In fact, on Newegg, it's the only Intel X58 motherboard in its price bracket, with the next most expensive board, the eVGA 170-BL-E762-A1 at US$430. This Gigabyte board is undoubtedly in a class of its own here.