I have been rebuilding my PC after a hard drive went south. The PC has all the same parts except for 33 per cent less ram and now running on Vista instead of XP. The turns in Supremacy were minutes long in XP. Now they take one or two seconds. I hope that helps. It sure looks better to me.
Now all I have to do is get the rest of the software working.
Then I might get around to playing the game.
I also figured out that my headset works best when plugged in.