Hi Folks,I've got a bizarre issue with FS9 performance, my basic setup is as follows:Intel core 2 duo E6600 2.4 GHz CPU, 2GB RAM, Nvidia 7600GT, win xp.Eveything is as it comes out the box, no overclocking and all my drivers /patches are up to date.I've been running fs9 maxed out, with no addons at all I'm getting more than 40fps at all times. With the most complex vc and all the PAI traffic/afcads I can lay my grubby hands on I'm, get 35fps at JFK even in heavy weather. Needless to say, I'm a happy camper.The problem is that I've been happily simming for a few months, then one day (no changes to the sim or addons) my fps drops to 10.0 and refuses to move. No problemo I think, something went awry at startup, just reboot and try again. Alas, same problem. I try everything I can think of: reinstall FS, complete virus scan, spyware scan (adaware, spybot and windows defender), reinstall gfx drivers, reinstall sound card drivers, defrag all my drives, reboot upon reboot. All to no avail! I get pee'd of and go to bed angry.Next day, fire up FS just in case and BAM! Back to super performance!To be honest I'm at a loss to explain this - can any of you tech gurus give me any insight? Has any experienced the same phenomena? How can I prevent this for happening again?Thanks for any advice!G.

Check the power supply, and the connector to the GPU. It might be an early warning of a power failure, or it might be that performance was retarded due to overheating - check that your fans are clean and the case well-ventilated. Was there a major weather change when the performance dropped? If things got a lot hotter then its likely overheating is the cause.Allcott

Did you install any applications software that might have changed a DLL file?Best and Warm RegardsAdrian Wainer