I had my computer hooked up to my living room PC last week to play games on. Running with the traditional 1920x1080p res, I took notice of the frame rates I was getting. Even with the game running in windowed mode running at much smaller res, the FPS still seem to give me the same numbers as if I was in full screen 1920x1080p. So I made another observation recently, when I moved my computer back into my office and have it hooked up to my 30" monitor which is running at 2560x1600. I fired up P3D and notice my FPS was the same if not slightly better than when it was running on my TV at 1920x1080. I don't understand why but wouldn't it give me a lower FPS since I'm running at a higher resolution? Makes more sense because their's more pixels it has to work with. I'm not complaning but it still stumps my mind why this is. Some things just doesn't make any sense.

This is something i can't quite understand either. I'm running Eyefinity (5760x1080) - when trying to figure out if that could be the cause of my many many OOM errors i noticed that my frames were the same when going down to 1920x1080. Odd indeed.

Could it be that based on your setup/configuration, P3D2 is completely CPU-bound? Under such scenario the GPU likely is underloaded, so increasing resolutions doesn't make a difference at FPS.