Dell has an OEM RX550 RX 550 4gb 4x displayport apd AB754483      
Hi,   I have a Dell Optiplex 7020 Tower PC with 16GB RAM and an i7 processor.  I want to buy a Graphics card for gaming ect. and want to know before I buy anything if my PC will sport a 4GB graphics card?  If not, what are the strongest cards that are supported?
Need help - Does my Dell Optiplex 7020 PC support 4GB graphics cards, and if 
yes, which ones?