It looks like your GPU is underutilized. Should be running about 90-100%. Have you tried changing your LOD settings? If not, try setting them to 70 or 80 to see if there are any FPS improvements.
Do you mean changing my usercfg.opt ?
Which values are recommended?
{Terrain
LoDFactor 1.200000 /Change to 3 or 4???
}
{ObjectsLoD
LoDFactor 2.000000 /Change to ???
}
The 1.5000 and 2.0000 parameters represent 150 and 200 for LODs on the graphics menu. Changing these to 80 using the sliders would show as 0.8000 in configuration file. Using 80 is a good starting point. 150/200 is high/ultra graphics settings. If these parameters are edited to 3.0000 or 4.0000 gives ultra+ graphics detail along with lower FPS.