Have an i5 4440 and a GTX 660 come in low settings around 80-110FPS, how much FPS would I get with the setup? Only Fortnite is played?
Don't worry Fortnite can also pack a mid-range PC on ultra
80fps minimum is not enough for you?
I would say at least 80 FPS on Full hd
You can't really say that, there may be benchmarks on Youtube for the processor and the graphics card, but you should definitely not get a GTX 1050 Ti, the RX 580 beats the GTX 1050 Ti by a long way, with little price difference, maybe one another processor, just watch Youtube videos which parts in your price range are the best, I would recommend that and by the way your case makes no FPS difference.
Fit on your board
1231v3
1070 gtx
16GB Ram