Hello,I did an upgrade from a dual core (4500) to quad (6700) and from a nvidia 8600 to an ATI HD4850. I have 2gb of RAM and Vista 32.My FSX was running smooth before (not high frame rate, but smooth).Now the frames are about 3x more in the same situation, but I get a huge FPS drop every few seconds, like from 35 to 10 FPS and back to 35 FPS a second later... so stutters every 3-4 seconds.I installed last ATI driver (8.9) and tried many settings in ATI control panel and FSX.cfg, tried affinity mas with 7, 14 and 15, same thing.Any idea is really welcome.Thanks,Ulisses

lock at 30hi/low is the nature of the beast when it has resources so most lock at 30 when that happens and set to unlimited in large urban or heavy weather situationsmake sure Vsync is working too

Tried to lock at 25 and 30, no sucess, sometimes while flying I get stutters while frame rate drops to 10-14 and then come back to the locked value.Vsync is ON. Weather is clear.Nothing changed in scenery area.Thanks,Ulisses