I have figured out that most of my performance problems come from 3d cumulous clouds. Does anyone else suffer from this issue? I can be flying along with at least 25 fps in the mountains and then when I fly around 3d cumulous clouds my fps drop to 12-15. I know it is from the clouds because if I check 2d clouds instead of 3d my fps immediately increase by at least 15 fps. There is talk about nvdia driver being a problem, but I have had this issue for as long as I have had fsx, and i ahve always had an nvidia gfx card. I always use the latest driver and right now im on the 174.20 betas. Is this jus the way it is, or could this be fixed by using an ati card or somethign else?

Is this FS9 or FSX? Try nvidia 91.47. Jason

Thanks, but those drivers dont support the 8800gt.

With your rig, I'm a little surprised you're having problems with clouds. I just fired up the default flight in FSX with a Baron, and I only get maybe five fps difference between 3d and 2d clouds. And thats with max visibility and 100% coverage. I usually fly with medium coverage/ min vis. Fps in the high 30's/low 40's at the start of that flight. What makes a big difference on my box is 2d or vc pannel. The other thing is I turn off AV,Defender,firewall...Big help. With my MB I can't OC anything. Bummer.Bob