Emboldened by the 1 gig of ram, and realizing I had therefore not yet actually seen what the 7600GT was truly capable of, I set the graphics settings as follows (fully expecting more of the same):
FSO: Everything on, adveffects on, AF 16, Vsynch off
Nvidia: AF = software controlled, Vsynch On, AA 8xS, Texture filtering: quality
Any situation without capships (normal flying, dogfights): 120fps
Staring at the fleet + luxor station: ~85-95fps
Dogfighting while fleet and/or luxor station are on screen: ~45-90fps, never less than 45 though
Not moving, watching capships fire beams at one another: ~30-50fps
Dogfighting in the middle of beams going off, capships moving, shockwaves exploding: ~25-50fps
Near shockwave, or if something warped in, possible small pause; in the middle of one huge shockwave, it dropped for a moment, to 13fps.
First, the game remained at all times fluid and playable. Second, with the settings that high, it looked absolutely amazing. Third, I am floored by these results. Without much tinkering, my rig is really plowing through a lot of activity and holding up relatively well. With tinkering, I think it's conceivable I could get it to my goal of never really dropping below 25, and not hiccuping.
Perhaps the best part of the whole thing was that when a shuttle or smaller cap ship, like a food container or frigate got blown up in the 2000+ km range, the shockwaves did not cause an interruption at all whatsoever to the action.
Now let's see what improvements I can make.