I've been monitoring my hardware more closely when I'm boxing and this is what I'm seeing:

my FX-8320 with 8 cores regularly pegs at 100% in Stormwind with even a small crowd of players around. This drops my FPS to 15 to 30. My GTX 1070 doesn't pass 70% utilization. Looking forward to seeing how 16 logical cores handles 5 boxing. Be nice to have a steady 50 to 60fps.