Dell Optiplex 7010 Small Form Factor Graphics Card Upgrade

Hey guys. I have an i7-3000 something processor with 16gb ram and 1 tb harddrive. It runs well for league of legends which I am concerned about playing. It can play fortnite, but the graphics just arent good. I have a 100 amazon giftcard, looking to spend about 50$ on a graphics card. It is a small tower, so I am looking for the best single fan graphics card I can get on a budget. Thanks