I did some goofing around, I'm using an 8600GTS.
Dominions seems to cap in the mid 50s. I could bounce around the settings, and it was mid 50s on all of them. Selecting Too High once made it drop to bounce between 20-30 for a bit, even after dropping it again, it took a few moments for the engine to decide to go back to flawless.
Oddly, huge numbers of particles from Heat/Chill or Cloud spells still rub me raw. I wonder if some of the load is getting pushed onto my sweet sweet Pentium 805D, which my doctor said should not lift more than 10lbs.
