now you have TWO graphics cards...
The integrated AMD GPU and the add in board GT 730
The memory allocated to the AMD GPU won't change, the GT 730 has 2 Gigs of VRAM.
Your monitor should now be plugged into the GT 730.
You can turn off the AMD GPU in BIOS if you like.
If you want more information, you can use GPUz to see information from both GPU's, the drop down menu at the bottom will let you choose the different cards.
https://www.techpowerup.com/download/gpu-z/