Possible, but I've got Virginia media at 75mbps cabled to the router and don't get any issues from other games (but that is playing total war, so not massively network intensive). I may go for a windows reset and try it again before taking the plunge, as I think I wold get a 1700x if I was going to.
I did read online that other people had issues with gtx1080 and i5 combo bottlenecking and they upgraded to an i7 3770k and that resolved it, but I can't find one of those for less than £200, so thought i would go for a big upgrade instead...but if it's only for 10% then it wouldn't really be worth it.