To detect a second monitor manually on Windows 10, use these steps: Open Settings. Click on System. Click the Detect button to connect to the external monitor under the "Multiple displays" section.

Now I've been trying to do this for a long time. I have a Radeon 9550 and a Geforce 4 Onboard, both AGP. Now, after looking on many different websites, they all say I can't have two AGP cards at a ...