I've been playing (and very much enjoying) the Call of Juarez demo. It's still over a month from release, so hopefully by the time it's out it'll be better optimized.
But extra optimization or not, this one is shaping up to be a real beast to run. It uses HDR, which unfortunately means no anti-aliasing for us nVidia users. But what really makes it tough on the cards is all the foliage and shadows. This game has superb textures and looks very, very good. Think Oblivion in the Old West. Like Oblivion, this game features a lot of trees and grass that are very complex and cast their own shadows. That means crunch time even for high-end systems.
At all maximum settings, I averaged about 30 frames per second in the town areas. In really heavy forest areas the frame rate stuttered into the teens. The in-game settings are surprisingly limited, and as such they all have a noticeable effect on the frame rate (unlike Oblivion, which has a lot of settings that don't seem to really affect the frame rate significantly).
The more I play of this game, the more I'm impressed. Phenomenal sound and voice acting, amazing graphics, and unique gameplay. This is on my list as a must-have of 2006. It's simply awesome.
Here are some pics from the game. As you can see from the frame counter in the upper left hand corner, those outdoor areas really crunch the graphics cards. This is with all settings at max except for shadows, which are set to medium. Enjoy the screens! Click for full-size. 




For optimal gameplay, I found that turning shadows to medium helped the most. Turning foliage quality down helped too, but I prefered the look of high quality foliage even if it meant losing a few frames. But the interesting thing here is that even when I put all medium settings on, I was still only hovering around 30 frames per second in that dense forest area.
However, one thing I really like about the performance is that it's very consistent. Unlike Oblivion which can be 50 frames one minute and 20 the next, Call of Juarez hovered right around 30 pretty much the whole time. It got into the 40s in some indoor areas and into the teens in some outdoor areas, but overall it was very consistent, meaning that even when my frame rate wasn't that great, it felt playable.
Games like this make the prospect of an 8 Series card that much more appealing. In fact, both this game and nVidia's 8 Series are slated for September... maybe I'll be selling my current card off, depending on what the 8 series offers.






