PCI-e lanes question

[Upwardconstant]

http://pcpartpicker.com/p/mbXByc

 

Hello, I'm looking at building a computer and this is pretty much the final parts list. However the cpu I have only supports PCI-e x16 lanes as far as I know. Eventually I am planning on getting a second gtx 970 but im not super worried about them running on x8 because I dont believe the difference to be to drastic but I am worried that the WiFi adapter at x1 will make it impossible to run them both at x8 causing to run something like x8 and x4 or causing the single card to run x8 because of the x1 of the WiFi adapter.

 

Someone told me the wifi will run off of a 2.0 instead of 3.0 x16 thus not taking anything away from the GPU. Is that true? Or should I change something and if so what?

[Glenwing]

No, the x1 slots are usually wired to the secondary PCIe 2.0 lanes provided by the chipset, they don't use any of the CPU's lanes.

[Mistersprinkles]

No, the x1 slots are usually wired to the secondary PCIe 2.0 lanes provided by the chipset, they don't use any of the CPU's lanes.

 

+1 X1 slots are PCH slots not CPU slots. 

[Upwardconstant]

So I'm good to go with the GPU slots then? No issues other than running at x8 instead of x16 in SLI?

[Aniallation]

So I'm good to go with the GPU slots then? No issues other than running at x8 instead of x16 in SLI?

Nope. The 16 lanes from the CPU are for graphics only, so you'll get 8 lanes of PCIe 3.0 per card, which is more then enough.

[WinNut]

It'll be perfectly fine running x8 as opposed to x16 SLI. The 16 lanes from the CPU are PCIE 3 lanes for GPUs and crazy stuff like PCIE SSDs while the lanes for the wifi card are from the chipset.