Two things about the CPU.
The 40/28 lanes support does not matter since the mainboard covers the PCI lanes with separate chips and does not care how many lanes the CPU provides.
And why do you want to buy the outdated 5930K since the 6850K is available for almost the same price? It's a bit faster, supports faster and more RAM, has Turbo Boost 3.0 and uses less energy, since it is fabricated in the newer 14nm process than the older 22nm.
The 40/28 lanes support does not matter since the mainboard covers the PCI lanes with separate chips and does not care how many lanes the CPU provides.
And why do you want to buy the outdated 5930K since the 6850K is available for almost the same price? It's a bit faster, supports faster and more RAM, has Turbo Boost 3.0 and uses less energy, since it is fabricated in the newer 14nm process than the older 22nm.