I have raised a case with NVidia support. As part of fault finding on my side, I have reinstalled the NVidia drivers via GeForce experience center.
There has been an marked improvement. Current the GPU is operating at 88 - 90%.
I have also reproduced the issue playing other games as well. (Warhammmer 2, Hell Let Loose)
I have reason to believe that there maybe additional issues with the more recent driver pack from NVidia.