did some research for you, this is the list of gfx cards that are compatible with your current cpu gfx cards
list
also i looked into 2 gfx cards on the list that are from amd radeon... which looks like they perform better than a high end nvidia card would.
Radeon RX 580 4GB Crossfire
Radeon RX 570 8GB
might have to upgrade your power supply depending on what you have.