atm AMD has the superior motherboard platform, why? PCIe 2.0 all the way on ALL ports, on intel you get PCIe 1.0 that realy bottleneckes USB 3.0/SATA 6Gbps to 250 MB/s not 500 MB/s like PCIe 2.0 gives you and PCIe 2.0 only on Graphics slot
this was futher solified with AMD's 890GX that has now a pure PCIe 2.0 all around the chipset even between NB and SB
i love my 790FX+SB750 motherboard why? i can put in so many USB 3.0 and SATA 6Gbps PCIe x1 cards i want and get the speed i expected from the controllers
here is a comparison of intels chipsets when it comes to SATA 6Gbps, keep in mind AMDs Driver is realy new and inmature atm given that marvell has had 6 months in the public with their drivers and amd has less than a month, but you can see it clearly has more in it like anand says, but back to my point notice the lame speed you get with PCIe 1.0 ;O
http://www.anandtech.com/storage/showdoc.aspx?i=3778