PCI-E 2.0 link width at x8 instead of x16

[Subnated]

I'm using a Z68 Extreme4 Gen 3 motherboard and according to CPU-Z, the port with which my GPU is plugged into is running at x8 yet the max. supported is x16?

Is this right? Should it being this? Should I increase it?

 

[stulid]

Which one of the PCI-E 16X slots is it in? top or bottom?

 

[Subnated]

Which one of the PCI-E 16X slots is it in? top or bottom?

Out of the 3.0 ports it's in the bottom one.
Out of all the 16X ports (2x 3.0, 1x 2.0) it'd be the middle one.

 

[Orcvader]

Out of the 3.0 ports it's in the bottom one.
Out of all the 16X ports (2x 3.0, 1x 2.0) it'd be the middle one.

Well there you go then. That one is only capable of x8. It takes 8 lanes from the top x16 slot. Quoted from the manufacturer site:

- 2 x PCI Express 3.0 x16 slots (PCIE2/PCIE4: single at x16 or dual at x8/x8 mode)

Stick it to the top PCI-E slot if you want the full x16 bandwidth.

 

[cmndr_andi]

On that board only the top one (PCIE2) is wired to run at full x16 speed. The middle slot (PCIE4) can only run at up to x8 speed - hence why the manual recommend if you only have one graphics card you should run it in PCIE2.

Also, you need to have both an Ivy Bridge CPU and PCIE gen 3.0 graphics card to achieve PCIE gen 3.0 speeds - otherwise it runs at PCIE gen 2.0 speed (which should still be fine for most current graphics cards).

 

[Subnated]

Thanks for the help everyone. It's showing 16X now on CPU-Z.