I have an Asus M4A89GTD Pro running Windows 7 64-bit with two monitors, one hooked to the onboard VGA and the other to the onboard DVI. I wanted to add a third monitor so I plugged in an extra ATI Radeon X1300 I had lying around.
The system now boots up on the third monitor, but neither I, the BIOS, or Windows 7 seems to think the onboard displays are there anymore. I see nothing on the displays and the don't show up in the control panel app for setting screen order.
ANy ideas what I am doing wrong? Is this something that should work, i.e. three monitors, two on onboard ports and another on an additional card?
More aboutadding monitor
There's no option in the BIOS to have the onboard VGA supersede the card? That should always be there.
I don't want the onboard VGA to supersede the the card. I want it tow work simulatenously, so I can run three monitors. Is this possible with my motherboard.