After installing the nvidia GTX480 I'm noticing a real choppy/non-linear gradient on the horizon and water as well in FS9. Aircraft and ground textures look great and frame rates are no issue. I upgraded from an ATI 4870 and never seemed to have this issue with the horizon before. I'm wondering if there are some nvidia specific settings to eliminate this. I've tried various antialias, bilinear and trilinear settings. They all have their various effects but none seem to change the non-linear horizon.Any ideas or recommendations appreciated.

Are you positive your color depth is at 32-bit and not 16? 16-bit color can cause banding like that.

Are you positive your color depth is at 32-bit and not 16? 16-bit color can cause banding like that.

Thanks Ryan. I just checked the NVIDIA control panel and it is 32 bit.Something I noticed after my post is that if I go to windowed mode and just maximize the screen the banding is much less. When I switch to view --> full screen it's pretty bad. It's just strange. All other scenery looks incredibly detailed and smooth but the horizon looks like some JPEG nightmare. I'll have to keep playing around with the settings.

Thanks Ryan. I just checked the NVIDIA control panel and it is 32 bit.Something I noticed after my post is that if I go to windowed mode and just maximize the screen the banding is much less. When I switch to view --> full screen it's pretty bad. It's just strange. All other scenery looks incredibly detailed and smooth but the horizon looks like some JPEG nightmare. I'll have to keep playing around with the settings.

Did you check your FSX settings for 32 bit? It's the same place you select screen resolution.

Did you check your FSX settings for 32 bit? It's the same place you select screen resolution.

It's actually FS9 that's the issue. But I think you fixed me up indirectly. When I checked the FS9.CFG, it was 32 bit but still showing the old ATI graphics card. Although in the game the graphics card shows gtx480, strange. Anyway, renamed the fs9.cfg file and restarted fs9. The new fs9.cfg file shows the correct graphics card and a quick check showed the sky looking quite nice indeed.I have to run but I will check it out further tomorrow. Could be a 'teaching moment' with regards to changing graphic cards.Thanks for the help.

So the issue was the fs9.cfg file after the graphics card change.All is well.

Yep, you always want to rebuild the cfg after a hardware change.