I have a rather antique I3-2120 and a recent, but low budget GTX950. A bit of tweaking gave me 50-60 fps near the ground, steady 60 at altitude when bombing. Had only singular encounters with other players in the BETA, so can't speak for furball performance yet.
Lowered the terrain detail somewhat, disabled shadows and ground clutter, and most post-lighting with the exception of anti-alias. Probably could get the graphics a bit better even while staying at high FR, but did not fiddle too much with it yet.