GTX 670 SLI Both running at PCI-E 2.0 x8 and x4 on 3.0 board.

[Voiaso]

Alright, So my specs are:
Intel i7 2600
2X GTX 670 SLI
12 gb of 1333mhz Ram.
Asus ROG MAXIMUS V GENE Motherboard.

The board and both cards are both capable of running at PCI-E 3.0 16x Yet my first card (EVGA GTW 670) Runs at a max of PCI-E 2.0 @ 8x. The second card (Asus GTX 670 dc2) Runs at PCI-E 2.0 @ 4x. Both are sufficiently powered, Fully plugged in and both remain at the same speeds when stress tested.

Is there anyway to change this/ A reason why it happens?

Also, here is a SC of GPU-Z For one of the cards: http://gyazo.com/b884499a9de19b66a4c9f0df8da47727

Now it never mentions in Bus interface PCI-E 3.0, Is there a reason for this?

Appreciate any replies.

 

[APassingMe]

Your cards are probably from before the PCI-E 3.0 protocol was released... not sure on why they are running at 8x and 4x though unless you are using your PCIe ports for something else like storage or usb 3.0.

 

[Guigoos]

Your board can only run one lane of 16 at a time. If you run two, they will be at 8

http://www.newegg.com/Product/Product.aspx?Item=N82E16813131830

See the expansion slot specs

 

[Voiaso]

Both will be at 8x, Yet only one runs at 8x. And they aren't being used for anything else.
And both cards where released after PCI-E 3.0 was released, I'm pretty sure on that one and they certainly support it.

 

[Guigoos]

Both will be at 8x, Yet only one runs at 8x. And they aren't being used for anything else.
And both cards where released after PCI-E 3.0 was released, I'm pretty sure on that one and they certainly support it.

can you show me SC of both cards?

 

[Voiaso]

Both will be at 8x, Yet only one runs at 8x. And they aren't being used for anything else.
And both cards where released after PCI-E 3.0 was released, I'm pretty sure on that one and they certainly support it.

can you show me SC of both cards?

I'm assuming you mean from GPU-Z:
http://gyazo.com/ccc15afba087e554f806b40572873d8e
http://gyazo.com/47e05a2d56a634f48286e969782098b0

 

[Voiaso]

I have since changed the configuration of the cards to optimize air flow and such. The cards have switched PCI-E lanes.

This is now what i get:
http://gyazo.com/724d72abb369c4180adc28c67657c1cf
http://gyazo.com/2e68d0e6be4f48053d69bb59fab31b71

However the EVGA card goes up to 2.0 under load.
Any ideas?