I have the same on board video card and it supports one monitor only. You do need second video card.

>On my PC, at home, I have the following chipset........
>
>Chipset: ATI® Radeon® Xpress 200
>Video: ATI® Radeon® X300-based integrated graphics
>Up to 32MB of shared video memory
>PCI-Express® (PCI-E x16) slot available
>
>I only see one video connection on the outside of the box. In Windows Display Properties Settings, I see 2 monitors set for Dual Monitor configuration.
>
>How do I go about setting up the 2nd monitor (assuming that the chipset does Dual Monitor)? Will I need a 2nd graphics board?
>
>Thanks!