My motherboard doesn't do dual channel so I don't think the mis-matched RAM is a problem. After fiddling around with the JointOps settings I got it working a lot better. I trippled the frame rates.

After spending more time in different games I'm really liking this card.
I'm going to reformat. It would be nice to have a fresh install anyway. Far Cry should definetly work on this card. All of the reviews show it performing very well. Maybe it's just the demo?
I have the newest drivers, same as you Netnamaken, maybe that's the problem. Which ones did you have before?
THIS is the card I bought.