there is no way to keep series 4xxx cpu., related motherboard and DDR3 to upgrade to newer series of systems
6th and 7th gen memory and therefore motherboards use 1.2 volts and DDR3 use 1.5 and DDR3L uses 1.35 and therefore incompatible with any H,Z,B 1xx and 2xxx series motherboards.
your next step is getting 6th or 7th gen Intel or Ryzen 1500 or 1400, all will require you to purchase CPU,. Motherboard and Ram all new.
if your PC has a 4790 CPU, know it is
less than 10% slower than a I7-7700 so why do you need to upgrade ?
do you have a complete listing of your system ? and what are your needs or issues making you consider an upgrade ?
curtesy of PassMark.com