[SOLVED] No display with gpu

[d4v1dv4n9]

I was helping my brother build his pc. Everything works fine except that the graphics card won't display. When I plug into the onboard graphics I get a display. I can login and get into windows. From there I can plug in a monitor to my dedicated gpu and I would get a display. So some how its using both my on board and my dedicated gpu. If I unplug my cable to the motherboard I still get a display. When I restart my pc I get no display at all.

 

[Ventrobear]

Can you show me a video of this occurring if possible?

 

[WarWolverineWarrior]

Make sure the fans spin, (meaning it has power) on bootup.
When you log into the PC with onboard option, does the Device manager show the GPU?

 

[geofelt]

In the bios, there should be a setting as to what graphics adapter is primary.
I think your bios is defaulting to the integrated adapter.

Normally, a motherboard that detects a discrete graphics card will change the default to the discrete card.