By 3 FPS AVG, which doesn't mean anything in these erratic and inconsistent multiplayer run-throughs. Keep in mind all run-throughs are different as its multiplayer.
The game felt choppy and more laggy during certain situations while playing the level. It's not something I can unfortunately display in a graph. You'd have to sit down and play it to feel what I feel, it just was close to being playable, but there were too many times during the level that the framerate dropped to unplayable levels. Tanks exploding, fires burning with lots of smoke, moving around certain things in the game with certain effects dropped the framerate too low at 4X MSAA with TriFire. QuadFire however, had the performance to push through those problems.