30w GT 1030, 75w GTX 1050, 75w GTX 1050 ti, 75w GTX 1650, and 50w RX 6400 will all work with the i7-4790 without the CPU bottlenecking.  They'll all work with your current PSU. Check your games or apps system requirements to see which one best fits your needs.  Not sure what games or apps you plan on running. There is also:  [URL]  With that list, you'd have to check wattages, PSU requirements, and fit.
please i would like to know will this work for my OptiPlex 9020 mini tower? [URL]
linux graphics card question