Aggeman,
I have pretty much the same system specs you do and I am experiencing the pixillated screen issue -- after playing for a while the screen turns into a pink pixillated mess and totally freezes. Control-Alt-Delete does not work and you have to do a cold reboot to restart the system.
I did notice one thing however. Before installing the patch, when the game credits first came on, there was a flash of the pixilliated screen issue but the game loaded normally after that and played for a while until the issue happened. After applying the patch, thet pixilliated screen issue did not flash in the opening credits anymore (and I thought perhaps the problem was over), yet the issue persisted after playing for about an hour.
This makes me wonder if this is a hardware issue rather than a heat issue as others have aluded to. Moreover, could this pink pixillated screen problem be a hardware issue with the GeForce cards and the Asus motherboards together? Is anyone with these cards and a different motherboard experiening the same problems?
Finally, I find it extremely frustrating that the makers of CIV IV are very quiet and not forthcoming with any meaningful communication regarding their released game. It reminds me of the debacle Masters of Orion 3 was and quite frankly I expect more from a game with Sid's name on it. Rest assured I will think twice before purchasing another game with his name on it if this is the best we can expect from technical support.
Thanks for any help or insight in advance,
Whitewolf
Asus K8N
AMD 3000+
1 Gig Ram
GeForce 6800 GT
XP SP2
CIV IN 1.09