I initially discovered this from installing FSUIPC 4.3.3.3. At times the POV hat would move smoothly, but at other times it was quite jerky. I blamed either FSUIPC or add-ons that I had recently installed until I eliminated them and noted slower frame rates for the same saved flight. The slower performance appears to be somewhat random in nature as to when it is present. I have tried running Task Manager when it's both working fine and when it's not, and the list of processes appears to be the same identical lists, the only diference being that the FSX process seems to be consuming less memory resources when performance is decreased ("36K" when not performing best to "84K" when performing better). I am looking for any unwanted processes that might be running on the system and consuming resources.Are there better apps to monitor running processes than the WinXP Task Manager? I'm also wondering if there's anything to monitor any parameters for FSX.EXE that might indicate what's going on? I have tried starting FSX with the application "Alacrity PC" to shut down unwanted processes but no change, sometimes it just runs better than others.Any ideas on where to look for clues regarding this would be greatly appreciated.Thanks, Bruce.Q6600 (not yet OC), 2GB DDR3 / CL7/1066, 8800 GTX, WinXP Home.

Hi Bruce,Have you tried using earlier versions of FSUIPC4 to see if affects things? If you think it is somehow related to FSUIPC4 it might be an idea to notify Pete Dowson on his forum here http://forums.simflight.com/viewforum.php?...126da32877ba695FSUIPC does have a logging facility but whether this would help is something only Pete can advise. I'm not aware of any better monitoring software than Task Manager but a specialist log might provide an answer.Cheers,

This might a number of things. Off the top of my head:Things internal to FSX:1. Weather updating (ActiveSky X or FSX default);2. New AI traffic coming within "range";3. Broken AI traffic models (for example, on my PC the MyTrafficX 5.1b versions of the 737-300 and 737-400 bring framerates crashing down when on Vatsim);4. Approaching an area of dense / complex scenery (which takes time to load);5. Changing textures (for example, daylight to dusk; land to ocean).Things external to FSX:1. MS Defender or other spyware/ anti-virus software;2. MS Windows Update;3. Firewall software;4. Slow/ broken network/ internet connection;5. Background services/ applications (for what it's worth, in my experience, this is actually the LEAST likely source of problems, especially with a four core CPU - but try setting the affinity of other services/applications to use cores 2 & 3 to see if it makes a difference).Tim