Yeah Im fairly confident its not the cvar setting, I mean just test this on nessus and you will see, with it enabled I get higher CPU usage by around 10% and around 80% GPU but I dont hit my cap FPS on lowest preset, with it disabled, im back to sub 40% CPU usage but sat at around 95% GPU usage on lowest preset but hit max FPS. I should not be hitting 95% GPU usage on lowest preset at 1440p on a 1080Ti, that to mean shows excessive GPU usage either due to the CPU not handling "the correct data it should" hence higher GPU usage or the engine graphics have taxed user hardware to much which explains the lower CPU usage as the GPU is now the bottleneck and not the CPU.