Problems with the graphics engine?

I did try to give clod a chance but i was getting low fps. I did manage to join a multiplayer game though and did a bit of dogfighting i followed a 109 down low and i sort of lost him in a forest he flew though i thought strange why didnt he crash but before i could find him i got a ctd. So if anybody has any tips to improve my gameplay experience on clod so i dont ctd and stuff ill give it another shot.