Hi guys,I have a very irritating problem: My framerate drops over time, but apparently not for all planes.The scenario is this:Start fsx and load the 737wilco. I see a framerate at about 40-50.Wait 30 minutes: I see a framerate of 17-40 (framerate keeps changing 17 - 16 - 17 - 16 - 40 - 17, mostly low numbers)Wait an hour: I see even lower frame ratesI have not done anything in fsx at all, just loaded the plane.Next problem:I then turn on the engines and the framerate drops 8 more down to 8! Pressing Q (to silence the engine sound) brings the framerate back to the 16.This does not seem happen with all planes. For instance the Microsoft 737-800 can run for hours without a drop in framerate,on the other hand it looks like the Leonardo Maddog is down to 1 fps very fast (I haven't tested this much yet though, it might have been a fluke).All this was done right after deleting fsx.cfg and then just setting some of the sliders in display options. Screen resolution set to 1280x1023x32 unlimited.I am running FSX SP1 + acceleration on win 7 ultimate 64 bit.My hardware is:Intel Core i7-860 2.86GHz8GB DDR3 Kingston 1333MHz (4x2GB)1024MB ASUS GeF GTX285 DDR3 PCI-EAny suggestions on what to do with this would be appreciated very much.Helge

I have now uninstalled FSX from my computer. then reinstalled it again plus the 737pic and the PMDG js41.Over about an hour, the framerate on the 737pic drops from 50 to about 10. The framerate on the js5