Never mind-- just saw the amd dual core update thread. thanks!
When I start GalCiv2, click New Game then click Next, the little ship in the bottom corner rotates EXTREMELY RAPIDLY. Nothing I can do can stop it. No big deal, right? Then, when I start the game, in the initial planet screen the planet rotates EXTREMELY rapidly. Then when I exit out to the universe view, everything is fine... until I scroll out of the present view, then the universe rotates EXTREMELY rapidly.
I have the same exact problem with the GT Legends demo, so I am 99.99% sure it's a video problem. I am a newb when it comes to video problems, so any assistance you could provide would be great. Attached is my dxdiag.txt.