I had this problem with another card.
You need to install the software first.
Then uninstall the current graphics driver and software.
Shut down the PC and replace the card.
Reboot and windows should identify and install the new drivers, follow any prompts.
If it only allows you to use default windows adapter when you reboot, select 'ok', the screen may look a strange.
then use control panel to install new hardware, follow the prompts...