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 Micro Desktop Black Intel Core i5 Processor Genuine Windows 10 Professional (Core i5, 8GB RAM, 128GB SSD) (Renewed) : Amazon.co.uk: Computers & Accessories