Never judge a book by its cover(Dell optiplex 9020 SFF)aka an office computer with 16GB ram a SSD the i7 4790 and a Nvidia GPU. Not the greatest but pretty decent imo. :
Can I fit a gpu Nvidia 1050 Ti into my dell optiplex 9020 | DELL Technologies
Dell Optiplex 9020 MT i5-4570 3.2GHz 8GB 120GB SSD DVD Windows 10 Professional 8 GB \ 120GB SSD \ Windows 10 Professional | Computers \ Processor \ Intel Core i5 Computers Computers \ Case \ Micro/Mini Tower Computers \ Brand \ Dell | AMSO
Nuovo per la scheda madre Desktop DELL Optiplex 7020 SFF 9020 SFF CN-0XCR8D XCR8D 0 XCR8D AM0327 LGA1150 DDR3 scheda madre testata al 100% - AliExpress