I think I figured out why my system has been having so many speed problems with this game. I've run it at 1024x768 or 1920x1200 in a window, even at other resolutions while full screen. I'm running an Intel Core2Quad Q6600 @ 3.0GHz and two HD4850s in Crossfire with 6GB of memory. Since the game played fine while paused and also worked very well for the first 10-20 minutes or so, I started to wonder what the real cause was.
I ended up speeding up the game and letting it play itself for a while just because I was losing and discovered that it got incredibly choppy when I did that. My assumption is that the performance issues are related tome always having all game options on Fast such as income, build, ship speed, research, and culture speed. I would hope those wouldn't change anything, but maybe they do. Anyone know more about this?
I've also seen that it's been recording games of mine. That's also probably slowing it down because those depend on writes to the drive, and probably not the same drive the game's installed on since it saves things in either %ProgramData% or %AppData%, both on my OS drive. It would be nice to tell all games I play "put save files in the drive I installed you in because I installed you in there for a reason, one of them might be data redundancy.
To clairify, my issue is taht the game runs choppy and consistently choppy. There are few times where it'll up the framerate or the animation rate and feel really smooth like it does in the menus before I start a match. Another thing I noticed was that I left AA at 2x. I don't believe that activates when in Windowed mode, but I turned it off anyway just to be sure. Been a while since i've played so I don't know if it affected anything or not.