My first CTD, not"A" key related

[AVGWarhawk]

Finally, my questions:
1. Does changing the Dev options have any effect on gameplay?
2. Do you think that with a 6800 I could have inadvertantly cause the CTD with changing my Hz?

1. Do not know but some say it helps with stutters. I have not touched mine. I experienced a CTD much the same. High demand on the computer. I just cleaned up the computer and replayed the senerio. No CTD. Played 4 hours straight, no CTD.

2. I changed my Hz last night to 75Hz. No issues or CTD.

I just think the large demand did you in and it was just a bad luck CTD. I say clean up rig(defrag etc). When you get into the heavy situations like that, keep the bouncing around with the camera and screens at a minimum. I know I have a habit of clicking inside/outside paning around etc.