What is the Motherboard? Which PCI-E slot is it in? How many graphics cards are you using?

Is your card in slot 1 the slot next to the CPU? Reset your MB Bios and I would also make sure you have the current Bios installed.
I also see that the PhysX Driver is NOT installed, you should remove all NVIDIA Drivers and reboot your PC and then Install the Driver and PhysX Driver and re-check. Any other PCIe Cards installed?

is that with the card at idle? if so then that is normal. put it under some load and see if it goes to 3.0. 

yeah I was thinking of it wrong. mine says x16 1.1 when idle and then x16 3.0 with any 3D load. 
 
do you have anything else that could be using pcie lanes? 

What CPU do you have?

TUCC1
I have just build my first pc and everything seems ok but I can only get my 1080 to run at x8? I only have the one card so it should be running at x16 I don't know where I'm going wrong plz help?

Also...if you click on the ? in GPU-Z , it will open up a rendering program that will load the GPU enough to show your correct PCIe link speed.

When I click the render test all that changes is the 1.1 turns to 3.0
changed the Pciex16_1 from auto to gen 3 and no change
Says linked at x8
 

It actually looks good the way it is now.  My motherboard shows something similar.
At Idle it claims PCI-E 3.0 x 16 @ x16 1.1
It jumps to PCI-E 3.0 x 16 @ x16 3.0 under load.
I think it is a power saving or TDP saving optimization built into the CPU.
Try running the load test and see what happens.

#1 Try reflashing the vbios on the card. Contact evga via phone and explain to them that you need to reflash your card and they should be able to help you out.
#2 Check your processor to make sure it's functioning correctly. You can do that by running the intel processor diagnostic tool listed here. Make sure your cpu is running at default clock speeds when running the diagnostic tool.
#3 Try testing the card in another machine to see if the card continues to get stuck at x8 speed. RMA the card if it does continue to get stuck at x8 speed while running in another computer.
 

TUCC1
thanks for the video but that's to change it to gen 3 isn't it? I'm already running gen 3, I think it made me find something weird tho. Nvidia control panel says x16 under bus is that what its running at or what it can run at? where has the attach icon gone can only insert pic through url?

It's what it can run at. Just upload your pics to imgur.com and post a link. Put spaces in your link to make your link show up on the forum as you don't have enough posts to properly post links yet.

I know it's obvious but have you tried re-seating the card? I had that issue once with my 780TI and re-seating it got it to show up properly.

Do you have stereoscopic enabled in nvida control panel? If you do it takes about 20 or 30 fps off. Make sure it's disabled.
Get the newest chipset for your motherboard. Download Intel® Driver Update Utility here http://www.intel.com/content/www/us/en/support/detect.html?iid=dc_iduu install it and run it. If it finds any new updates for the chipset download it and install it.

Ye, I'd call this a bios setting all day..

TUCC1
Ye i will call them, they'll just tell me to try a different card tho I bet. I was on the live chat support the other night, what a joke that is. That's why I tried here
Thanks guys

I heard Asus support is bad. Hopefully your next Motherboard will be an Evga board.       =)

The_Ether_Bunny

XrayManI heard Asus support is bad.

 
I have only used ASUS support once but it was great. Walked me through troubleshooting then gave me an RMA after all steps didn't get the board working. 
 

Glad you're experience was a good one.