Sorry to bump an old thread but I am having the same issue. I only have the K95 Platinum keyboard, and I don't have the option to disable full software control. That button doesn't even exist as a setting anywhere for my K95 in iCUE. Both iCUE (v3.24.52) and the firmware on my K95 (v3.21.28) are up-to-date. When I notice the 100% CPU usage most is when either The Division 2 crashes (I have a separate RGB profile for that game) or when starting up Black Desert Online (goes away after start-up, does NOT have a separate profile). It uses 100% CPU during those times and even the mouse on my screen moves with incredible lag. Been this way a couple months now, still no fix for me. I do have MSI Afterburner installed as well but I don't use it (might be running in the background, I don't know).
