You'll need to remove the drivers for the old card, shut down the PC, add the new card and switch on, go into the BIOS and disable the onboard graphics and then Windows should only detect the new card. Install the drivers.
Samsung Galaxy S8 review
1995-2015: How technology has changed the world in 20 years
This poetic animation about monsters is illustrated in a Van Gogh painterly style
How to get WWDC 2017 tickets
Synology invites you to visit them at Insomnia on 26th – 29th August. Book your tickets now and visit Synology.