Adding Third Monitor

bruestle

Distinguished
May 7, 2011
4
0
18,510
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?

John