How do I get my computer to recongnise multiple video cards?

I have checked the video cards individually and they work fine by themselves. I can not get my computer to "see" both video cards at the same time. I am trying to use multiple monitors.|||By now windows should assign resources to them on the fly. You might be getting a conflict like an IRQ conflict though still. Make sure your drivers are current for both cards.



Are these major name brand cards or cheap bargain cards?