Early Look - Gigabyte GA-EX58-Extreme Motherboard

“Our concerns about style aside, feature-wise we've got a very good board here - there are three PCI-Express 2.0 x16 lanes that follow either the x16-x16 or x16-x8-x8 way of things. Both ATI CrossFireX and Nvidia SLI are supported but there's no (unnecessary) extra Nvidia NF200 chip in sight.
Organised in this way with PCI-Express lanes solely from the X58 northbridge for maximum efficiency, cards used in pairs should be preferred to attain a maximum bandwidth. This makes ATI's X2 hardware technically better off, however 3-way SLI is still supported even if the bottom slot is a little low set for dual height cards. The open ended PCI-Express 2.0 x4 slot at the top means if you really, really wanted to run four ATI cards, you could, but the bandwidth would be pretty limited. Its greatest benefit is for PCI-Express x4/x8 RAID cards or other performance peripherals, however it'll likely be used for long x1 cards since the x1 slot above it runs directly into the northbridge.”