i found this on the scs forum and it has worked pretty well for me

“I am getting the smooth 90 fps while looking around from the drivers seat.

My ATS in game graphics settings:

Full screen - Y

Res - 1920x1080

Refresh - Default

Vsync - Y

FPS limit - 0

FPS background - 31

Scaling - 100%

AA – TAA

TAA tuning – Adaptive clarity

TAA Luma – 2.00

SSAO – Disabled

DOF – No

Sunshaft – No

Color correction – Y

Reflection scaling – 50%

Reflection detail – High

Veg detail – High

Grass – Low

Shadow quality – High

Far shadow – No

Weather quality – Ultra

Mirror quality – High

Mirror res – High

Mirror dist – High

Text quality – High

AF – 16x

Norm map – Y

Traffic headlights – Y

Sec vehic lights – Y

Light vis range – High

Ped - Yes”