Just what are the specs of the PC you are testing? Which CPU (BTW, I found stuttering with HT enabled) and how many cores at what overclocked frequency (needs to be 4.2 Ghz or so)? What speed RAM and how much, FS2 and scenery should be on an SSD, which video card and what driver set?
I also suggest you use MSI Afterburner with FPS display to observe and retest.
Lenovo ideacentre Y900-34ISZ with Intel core I7 6400K 4GHz, 24GB RAM, NVidia GEForce GTX 1080 Driver (latest) 184.108.40.20605, Window10 Home, 1TB HD Oculus CV1; OpenGL 4.4 same driver number.
I'm not the machine expert, so I'll run that by Alex to see what he says. I don't know what speed RAM, I'm not sure we run all the data from SSD (I believe so), I don't know what HT is, and I know we overclocked.
Will look into afterburner.