Hello. I am a brand new user of the PMDG ship. I am very pleased with the performance of the plane on my old machine (P4 2.0, GF3 Ti500, 768 Ram). I am getting frames around 25 FPS. When I activate the airport, navaid, wpt buttons for the ND, My frames drop to 2.5-3.0 FPS! What is going on here?Thanks,John

John,So that you can see whats happening, it is worth activating Windows Task Manager (rt click on Task Bar, left click on Task Manager)and set the Performance tab. Park the window out of your way and try activating one of the ND buttons with FS9 running. It may be that your processor is already doing its best and the additional load is too much.When I was trying to run FS9 and PMDG737 on my old 1.5GHz processor the ND button response was very slow.David.

Thanks for the tip David, I will give it a try. I fear that you are correct about the processor. John