Not detecting graphics card

I purchased a new i3 pc with asrock h81m-s1 plus motherboard.
But it is not detecting my nvdia geforce 9500 gt graphic card... It shows no display.. And in devixe manager also card is not listed

Please help
Reboot your computer and press the appropriate key to enter BIOS. The key you need to use for this appears briefly on the screen as the computer boots up, but common keys are “F1,” “ESC” and “Delete.”

Step 2
Use your arrow keys to locate the On-board Devices, Integrated Peripherals, Advanced or Video section. The exact location varies depending on BIOS vendor and version. The appropriate menu enables you to disable or enable integrated or dedicated graphics, and may offer an auto-detect option.

Step 3
Enable the “auto-detect” option, if available.