OS not loading after GPU install

[kukabarnabas]

So I just bought a pc, and it works just fine, until I install the GPU. To that point, my Windows is working, BIOS see my hdds, and there is no problem. But when I plug in my GPU, it says there is no bootable op. My bios is set to uefi and my hdd is in gpt. The whole pc is brand new apart from the hdd, but it only does this, when I istalled the GPU. Without GPU, i can use the pc just fine. Oh and everything is plugged to the right place firmly.

 

[Ralston18]

Please add in your system specs, OS, make and model pc.

Make and model GPU?

 

[kukabarnabas]

Please add in your system specs, OS, make and model pc.

Make and model GPU?

-i3-8100 cpu
-geforce gtx 1050 ti oc (gigabyte)
- 500gb hdd
- 8gb ddr4 ram
- 450w power suplly
- windows 10 pro
- gigabyte b360m aorus gaming 3 motherboard

 

[norcalsc]

are you plugging monitor into GPU and not motherboard? try a different display cable

 

[kukabarnabas]

are you plugging monitor into GPU and not motherboard? try a different display cable

I tried with vga and hdmi, and I plugged both into my gpu.