Robertfm wrote in Thu Nov 07, 2019 4:04 pm:This sort of thing just confuses me, everything I have read of GPU's and CPU' s suggest CPU usage is maxed out will affect GPU. But my CPU is operating in region between 30/40%. But my GPU only about 30% it makes no sense. Articles I've read say it should be 99 to 100%. The suggestions in the article point to a game one is playing.
If you're interested in flying then you only need 50fps; it is what the FAA require to certify a Level-D simulator. There is little point in having a frame rate higher than your monitor's refresh frequency (often 60hz) I usually fly with my frame rate locked at 30hz because consistency is more important than performance (for me).
So really I'd suggest that you should just be pleased that you're getting the sort of performance that your hardware is capable of providing.
Try flying over one of the busy areas (e.g. Paris, LFPG, LOWI) and see what happens to your GPU utilisation
I've been investigating FG performance for a few years now and can report that currently FlightGear can only use a single core to do most of the work of rendering and simulation; and thus on a system with 4 cores the maximum CPU % will be 25% (12.5% for a hyperthreaded 4 core CPU). So if you've got two cores and you're seeing 50% (or more) then that's almost as high as it could go - and there's little that can be done to improve this because FlightGear is using OSG which in turn uses OpenGL and the underlying GPU/driver architecture simply cannot be driven effectively from multiple threads (CPU cores).
I guess what I'm getting at is that the overall CPU and GPU utilisation as a single percentage value is potentially misleading - because it depends on how all the various stages of CPU and GPU processing (particularly GPU processing) have been added together to make a single percentage number. Also all of this is irrelevant if running at vsync.
Now maybe it's great that FSX can achieve 100+FPS; but really that's of little importance unless you're on a 120hz monitor.
Tell us what your monitor vsync rate is.