Everything looks fine with GPU but it won't work.

[Skiff]

I recently finished building my new PC and had a problem where it would not POST the conclusion was that it was the motherboard or CPU so I got a replacement motherboard and the PC booted fine, windows is installed everything looked good. I updated all the drivers and ran a benchmark test with novabench to see how it was rated.When it gets to the GPU test, it gets between 4 and 11 fps before novabench decides that it cant complete the test and stops. I Checked device manager, it says the drivers are up to date and it is working properly. I decided t try another benchmark, used UserBenchMark, similar issue, this time it it skips the GPU test altogether with the message:

WARN: skipping Microsoft Basic Display adapter - Unable to locate attached display.
WARN: skipping Nvidia GeForce GTX 1080 Ti - Unable to locate attached display.

I cant change my resolution, it is stuck at 3840 x 2160 (which seems a bit high considering my current issue) which is greyed out.
In device manager under display adapters it shows not only the GTX 1080 Ti but also Microsoft Basic Display adapter but my current, healthy PC only shows the GPU. I thought maybe this was the cause, maybe it was defaulting to the onboard graphics so I uninstalled it and rebooted and its back.
I launched World of Warcraft to see how it would perform because it should be able to do ultra settings with ease, it got 1fps.

The whole build is:
Intel i7-8700k
ROG Maximus X Hero Motherboard
G.Skill - Trident 16GB 4000
GTX 1080 Ti ROG Strix
EVGA SuperNova 850w Gold
Samsung 850 EVO 250gb SSD
Nzxt h440
Noctua NH-D15

Any ideas?

 

[bajgur]

try reinstall your display driver, use this (DDU):
https://www.wagnardsoft.com/

 

[Skiff]

Just tried that, nothing has changed.

 

[SkyNetRising]

Any ideas?

And your monitor is connected - how exactly?
To video output on the motherboard?
Connect it to your graphics card.