My laptop screen is UHD, my secondary monitors are FHD/QHD. The NZXT window scales itself according to the UHD screen regardless of what monitor it's on. Not only that, over half of the window is just white space; it does a poor job of laying itself out when used in a heterogeneous monitor resolution environment.
Attached is a screen shot of the layout. The window takes up most of my 2560x1440 monitor.