Good observation, well remembered.
When the CPU is overloaded the GPU and its memory are also overloaded. I will pay attention to the GPU resources.
My GPU is Intel(R) HD Graphics 4600 (HSW-DT GT2), 1200MHz, 80 cores, 20 CUs, Driver 20.19.15.4835
Graphic adapter: Intel Haswell-DT GT2 - Integrated Graphics Controller
Windows Task Manager without processor overload:
Dedicated Memory: 0.0 / 128MB
Shared Memory: 0.5 / 2GB
Regards
GTI