installing video card with no OS

I JUST GOT A BAREBONE SYSTEM AND I’M TRYING TO INSTALL A VIDEO CARD (NO HARDDRIVE,CD,FLOPPY OR VIDEOCARD CAME WITH THE SYSTEM). WHEN I BOOTUP THE PC THE VIDEOCARD ISN’T RECOGNIZED SO I CANNOT SEE ANYTHING INCLUDING THE BOOTUP SCREEN. THE VIDEOCARD IS PCI AND I HAVE TRIED SWITCHING TO DIFFERENT PCI SLOTS AND I HAVE TRIED RESETTING THE JUMPERS FOR THE CMOS. THE VIDEOCARD IS NEW SO IT ISN’T THAT. ANY SUGGESTIONS – THANKS.