Just installed gtx 1070 ti, PC doesn't detect

[bennynor]

So just replaced my old r9 280 with a GTX 1070 ti, and the led is on the GPU is lighting up so I assume it's connected. However when I start the PC it doesn't get detected. The GPU is on, so what is the problem, do I need to factory or? And my monitor is on 64 hz instead of 144hz without a GPU. I tried downloading the driver but it doesnt detect. Using displayport too. I tried to click on search for drivers on the internet, but it said that Windows had problems downloading it and couldn't do it. Tried downloading manually from site too. Look at links (pics). This is my PSU and my motherboard
https://gyazo.com/6d40e527bf52e88e9178107bf9b07d47
https://gyazo.com/e96379abc17a509a209592f775083e07
https://gyazo.com/7fcfabb165fb4b252188e1499132ffef (Skjermkort=GPU)

 

[swpt]

You connected the pcie connectors?