You might want to hold off the plan of purchasing the RTX A2000. The PCIe x16 graphics slot is too close to the power supply and will not fit a double slot cards. 
I purchased Dell Optiplex 7000 SFF recently and it's not arrived yet. In the meantime, I have found RTX a2000 is a low profile card with good performance and would like to buy it. My concern is if the RTX a2000 graphic card will fit into the Optiplex 7000 SFF board or not. Any comments would be appreciated!
Can I install RTX a2000 on Dell Optiplex 7000 SFF?