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. :
Dell Optiplex 9020 SFF - Mischmaschinen & Zubehör
Dell OptiPlex 9020 PC gebraucht und günstig kaufen