http://www.bf4blog.com/battlefield-4-on-windows-8-will-have-better-cpu-optimization/
Its obvious windows 8/8.1 will run bf4 better. Night and day difference.
http://www.gamepur.com/news/12283-b...windows-7-performance-no-shuttering-incr.html
They better fix that because most people aren't going to be using Widows 8.X to play it no matter how hard you wish it.