http://www.techpowerup.com/178545/AS...rocessors.htmlASUS did the unthinkable yet simple, by innovating the first AMD platform motherboard that features PCI-Express 3.0 x16 slots, the Sabertooth 990FX/GEN3.0 R2.0. Long naming aside, the board provides you a couple of gen 3.0 slots by using PLX-made 48-lane PCI-Express Gen 3.0 bridge chip.
While the board features four PCI-Express x16 slots, only two similarly-colored slots can be used at a time, of which two are PCI-Express 2.0 x16, wired to the 990FX northbridge, and two slots being x16/NC or x8/x8-capable, being wired to a PLX 48-lane PCI-Express Gen 3.0 switch, which in turn takes two PCI-Express 2.0 x16 links from the northbridge.
Apart from this unique feature the socket AM3+ Sabertooth 990FX/GEN3.0 R2.0 features AMD SB950 southbridge, eight SATA 6 Gb/s ports, two eSATA 6 Gb/s, 8-channel HD audio, six USB 3.0 ports, and a zesty ASUS-exclusive feature-set. The new board could be released to the market very soon.