Hi GuysI have FS9, does anyone have any problems with stuttering after they've been flying a while? I have quite a top end system and i'm fine for about an hour or more, but after that I experience a gradual slowdown until the sim is unflyable and just freezes! I've patched to 9.1, got the latest vid drivers and no antivirus running at the same time, any ideas?Horgy

Heat problems maybe?

It would be helpful if you could provide some information about your system.Doug

Sorry, it's a Pentium P4 3.0Ghz, 512Mb's RAM, Nvidia GeForce FX5200 (128mbs RAM) got 15GB's free on a 80GB drive.Horgy

Horgy,I hate to tell you that, but a FX5200 and 512MB is not really what is considered high-end. Your CPU is adequate, but stutters are not uncommon with this setup, depending on you FS9 display settings. Obviously, you can't max every display setting out with your setup, so I assume the cloud draw distance, 3d clouds, 3rd party airport scenery, etc. is causing the slow-down. A similar setup with 1GB RAM and a Radeon 9800 produces about 20-25fps in 2D view and about 7-20 (depending on the settings, weather, etc.) in the Virtual cockpit.Try playing around with your display setting, most importantly cloud draw distance, 3D cloud percentage while in-flight.Good luck!

Ahh yes maybe so, but why would I only experience stuttering after 90minutes? I get 25fps up until then, and still continuously as the stutters get longer and longer, until the duration of the stutter is greater than the distance between them and flightsimulator more or less implodes. Does that make sense?Horgy

Hi HorgyMaybe overheating problems as stated above.See the CPU and HD temperatures after some time of flying.Hope it helps :-)RegardsCMG

What is normal temp? Mine runs about 45-53 degrees for the CPU, is that normal? It is higher with FS than just XP, but I suppose that's to be expected.Incidentally, I bought a PC from PC World here in the UK, any idea how I find out what pin RAM it has, or what size fan i'd need for the case if nessecery? Box just said "DDR RAM"Horgy

45-53 degrees (Celsius) is about average for the CPU under high load with a stock fan.The standard RAM is 184-pin DDR. You can hardly find any other type of RAM. If it is PC2700, PC3200 or higher doesn't make any (or just a slight) difference at all, assuming your mainboard is able to recognize and run it.

My first thought is that you're using some kind of FS9 add-on that has a memory leak, and thus your physical RAM is gradually eaten up over those 60 or so minutes, and your system resorts to swapping.Disable/uninstall all of your add-ons (painful I know) and see if it still does this. If it does, then my first thought was a bad one 8^) .Dave Blevins

>My first thought is that you're using some kind of FS9 add-on>that has a memory leak, and thus your physical RAM is>gradually eaten up over those 60 or so minutes, and your>system resorts to swapping.>>Disable/uninstall all of your add-ons (painful I know) and see>if it still does this. If it does, then my first thought was a>bad one 8^) .>>Dave BlevinsYes I have this problem too!!! I usually fly 1 hour or less flights so the stuttering isn't there or not bad enough to notice. However, if I land and then start another flight without restarting FS I get stutters that get progressively worse as time goes on. Also, today I flew a single flight which was longer than my typical flights. I took the MS default lear45 from KDFW to KEWR (about 2.3-3 hours) and the stutters were so bad by the time that I reach New York that FS was like a slideshow. It was about 1 frame per 5 seconds and my terrain was a blurry mess. I was thinking as was suggested in this last post that it may be a memory leak or otherwise poorly behaving add on. I have a fair number of add ons installed these days and I did not always have this problem...Here are some of the addons which I've added recently that may be the culprit. If the original poster or others with this problem also list their addons maybe we can narrow it down to a few suspects. I'd like to avoid uninstalling everything if possible.Dreamfleet Bonanza A36 Ultimate TerrainSquawkbox 3FsPassengersFS Skyworld 2004ActiveSky 2004.5FS Genesis LandclassFS Genesis 38m MeshTrackIR 3Pro with v4 softwareFsEconomyMy system is an Athlon 64 3500+ with Ati 9800Pro 1Gig DDR2 dual channel. Usually gets 30-40 fps no problem until the stutters start creeping in.

FS9 has a known memory leak with scenery packages which contain an empty texture folder. As you probably already know, scenery packages usually contain two subfolders, named 'scenery' and 'texture'. However, some packages, such as terrain mesh and landsclasses, only have scenery data and contain no texture data. Such packages may include an empty texture folder and these can cause memory leaks.The solution is pretty straightforward. Look for add-on scenery packages which contain texture folders with no files in them and delete those empty folders.

>The solution is pretty straightforward. Look for add-on>scenery packages which contain texture folders with no files>in them and delete those empty folders.>I just checked all my scenery subdirectories and the ones with "texture" folders do have stuff in them. I have to wonder though, if that issue is a known memory leak why did Microsoft not fix it in the patch?Thanks anyway. Any other ideas?

Run your scenery/textures through FlightSim Manager to detect duplicates or corruptions.Another tip is that you can easily check for memory leak in Task Manager (taskmgr.exe). Enable the "memory delta" option in the "Select Columns" option to display and monitor the running processes. If the delta doesn't return to zero, you have the leak and the process that caused the leak.If the process is FS9-related, disable your add-on scenery, or some of it to pinpoint the culprit.Good luck!

what about a bad ai aircraft texture. how can I possibly find out which one might be causing the problem if I have hundreds installed??