Dual box WoW Classic...2080TI 75% GPU Utilization?

[IndySSD]

Machine specs:
R5 2600
570x mobo
16GB 3200 RAM
EVGA 2080TI
Samsung 970 EVO M.2

I'm upgrading to a R7 3700x this weekend and I was thinking about maybe upgrading to 32GB RAM as well so I wanted to check out what my biggest area of improvement was RE: Hardware to avoid any bottlenecks.

I was REALLY shocked to see that my 2080TI is operating at 75% load and everything else was under 40% (CPU/RAM).

Is there something about running 4k primary window and 1080p secondary window that stresses out the GPU? COD MW at 4k with HDR and RTX on 2080TI hovers 30-35% utilization. Overwatch hovers between 20-25% at 4Ik ultra max everything settings.

Boxing setup is ISBOXER
1 account per monitor, primary monitor is 4k60, secondary is 1080p60, wow and isboxer set to limit fps to 60.

http://imgur.com/a/g5vcMY7