Just adding: if you use windows 10 and chrome and have a twitch stream open (even your own), it kills your fps completely. I have really high-end hardware and my cpu load is 70-80% with just chrome+twitch open and 1 wow client (I can have like 20 edge streams open w/o any impact for the record). Reason why I mention this is that while streaming some people have their own broadcast playing in the twitch dashboard. If that is the case you might want to check that first.