It seems that I have my problem solved. I got on the net last night, my time and researched and after a short time found some items to look at.
The issue was in the Nvidia Control Panel, Progam Setting.
The frame rate was set at 39 fps, when, I don’t know. It is now set at a ridiculous number and I am returning around 50fps in heavy scenery places and around 96fps
over the desert.
I may be able to squeeze a bit more performance from somewhere but, happy with what I have got at the moment.
Thanks to everyone for you time and advice, very muck appreciated.
Happy simming.