Hi I've not really upgraded in some time still using a 7990 lol, but I would start with a,
I5 1150skt upwards
Some half decent ddr3/4
And a 980
Dont listen to people that try and say get a 1080 and a 6core i7 blah blah blah lol I'm using a x79 with a 7990 and still plays EVERYTHING