HiI have actually asked for clarification on this exact issue from Gigabyte and as soon as I hear I will let everyone know.
As I mentioned, linked above, on the overview for your model it says it will have upcoming 22nm CPU's support.As for the PCIE 3.0, that means you will need a PCIE 3.0 graphics card, and a CPU capable of PCIE 3.0 processes