Oh, thanks for reminding me. SupCom was in fact one of the first games I tried out on my new PC, but at the time it was super laggy, which the forums seemed to attribute to an Nvidia graphics driver patch issue. So I put it down and haven’t looked at it again since. Just checked it now and it’s perfectly smooth!
Edit: Seems like the fix was recent, in the 466.11 drivers. So if you have issues, check you have those installed.