I have two screens, one HDMI and one VGA, pluged into my main graphics card which is a Radeon 7800. I have a second graphics card installed which is a pretty old NVIDIA. However, when I plug a VGA monitor into the NVIDIA it doesn't show up. I am entirrely sure the card works because if I remove the VGA from the Radeon the third(NVIDIA VGA) monitor works and I can use it then. If I remove the HDMI from my Radeon it the second and third also work. - All three monitors(and the two GPU's) are detected by Windows's Device Manager. - I would like to have three monitors. No SLI of CrossFire is wanted, I just want three screens. I am running Windows 10.
Question: How do I enable three monitors at the same time from two different GPU's.