Semi Accurate writes AMD's Hudson-D3 chipset will offer four USB 3.0 ports:
Finally the high-end Hudson-D3 has all of the features of the Hudson-D2 plus support for four USB 3.0 ports. Interestingly it appears that the Hudson-D2 and D3 supports the integrated SD controller, a feature you don’t usually see in desktop chipsets. A common feature between all three desktop chipsets is that they appear to use a faster chipset interconnect as well, presumably using four PCI Express gen 2 lanes, compared to four gen 1 lanes for the mobile chipsets. This makes sense as you generally have more devices connected to a desktop chipset compared to a notebook chipset.