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After a day playing around with settings (a couple hours' worth of actual sim time) I've discovered something about the stuttering that's occurring for people, regardless of their specs. I want to make clear that this is just MY experience, and I'm not knowledgeable enough about the way the sim or the CPU and GPU work to suggest how applicable this might be, in general. But this is working for me right now. First, here's what I'm playing on: i9 9900, Geforce RTX 2080ti, 64 GB DDR. I play on a widescreen, 3440x1440 resolution. I'm finding that the sim runs very clean for me, almost regardless of settings. I have nearly everything cranked up to max, with the exception of a few sliders (water and reflections and shadows) set to high instead of ultra. But yes - I was getting stutters when I cranked it up this morning. Periodic ones, sometimes, and other times consistent ones. Just little hitches where the sim seemed to be "thinking" about something rather than running. So I started, one by one, altering the settings, and none of them seemed to make a difference. But then, really just on a hunch, I turned off texture supersampling, which is described in the sim as controlling fine detail like "road marks." I wasn't sure what that meant, but when I zeroed it out - voila, not a single stutter. The cost to visual quality, so far as I've been able to tell, is confined to runway markings - numbers and lines that don't appear as crisp as they did before. (I had this set to 8x8). I'm not seeing anything different, anyplace else. I tested this out just now on a short-ish flight from Sacramento Executive (SAC) to Tahoe Regional (TVL). I used the TBM. Short hop across the mountains, and down into the lake valley, one of my favorites for VFR. Not a single stutter in the entire flight. There were two hitches I noticed, when the sim was clearly loading some piece of terrain... but again, just twice. Otherwise, perfectly smooth flight, with the settings nearly at max. I don't know much about supersampling, other than what I've said here. Is this mayb a glitch with the setting, or is it a setting that, when jacked up, somehow interrupts the processing of the sim? I don't know. But I wanted to share here, in the hope that there's something in this post that helps decipher solutions. Would love to hear what others are finding. As an aside, I'm pretty blown away by the sim so far. Unbelievable detail, really nice, nuanced flight model and stunning weather effects. It is a GIANT leap forward in flightsimming, in my opinion. Yes, there are many many areas that need or could use improvement, and some glitches that clearly caught Microsoft by surprise, as they weren't things that seemed to report out of the beta. (For reference, my first flight simulator was Flight Simulator 4.0, in 1989, and I've recently been playing X-plane and P3D, both of which I consider outstanding sims. This one, though, on day one, is clearly the birth of another generation.)

Hello people, I have been dealing with this problem for a very very long time. What my problem is, is basically that everytime I just pan around with a view in FSX (no matter which view), it looks as if I have some sort of cuts or cracks in the screen. I have had this problem for the time since I played FS, but since I recently bought a new computer, and I got a new monitor with it, I only started to really see it more clearly. I have a link to a YouTube video, where you can see what kind of issue I have: https://youtu.be/wSrObxJaJD8?t=2m33s Now, the subject of the video is irrelevant, but look closely to the screen, and you can see quite some lag stutters, with parts of the screen not bordering each other correctly. This is the problem I have been dealing with for a long time, and I would like to ask the FS community of how it might be solved. Regards, Raphaël.

Why do I get 20-30 fps in cruise and it's really stuttering. On ground I can get 30-50fps depending on scenery and it's not stuttering. Using Prepar3D V3.4.22.19868. Maybe overclocking my CPU had to to something with it, because before that it didn't stutter that bad in cruise. Specs: Gigabyte GTX 770 2GB, i7 4790K @4.4ghz, 16GB DDR3 RAM, Asus Maximus VII Ranger motherboard, CM Hyper 212 Evo CPU cooler, 500GB Crucial MX200 SSD (this is where P3D and addons are installed), WD Black 1TB 7200RPM HDD, Corsair CX750 750W PSU, Windows 10 Home 64bit

After reading the "umpteen" threads on micro-stutters, I wanted to see if I could improve on my own. I just discovered my three 27" have the capability to run at 30Hz. so I have been testing the 30/30 scenario (30FPS at 30Hz), and I must say it is about as smooth as I think I can get P3D at this time with my set up. Question is do you guys who run it at 30, do you revert back to 60Hz when you are done flying? Any residual effects that you have noticed running your displays at 30Hz 24/7? Clutch

I have read many forums over the years regarding FSX performance issues. We all want our flight sim to run as smoothly as possible with good frame rates. For me, a visit to Bojote Venetubo's web site and a couple of Nick N's tweaks pretty much sorts out most of my issues. Recently I had to install a new hard drive in my computer which resulted in a clean install of FSX together with my many add ons REX, VOXATC, GEX, UTX, PMDG etc etc. After endless nights of re-installing I reached the stage where it was time to add some liveries for my PMDG aircraft. I have the NGX 737 -600 to 900 plus the 777 and it's variants. Up to this stage I had tried a few test flights and was pleased with the performance of FSX. It seems that a clean install was worth the effort after all even though it had never been my intention. I love to fly scheduled flights in different parts of the world using the appropriate airline so a variety of liveries is important to me. I installed a few from PMDG through their Operations Centre but discovered that FSX Liveries had an excellent choice available. These are all .ptp files and will install through the Operations Centre. I must have downloaded close to a 100 liveries altogether spread across all the PMDG aircraft. After a couple of days of flying, I noticed that FSX would hesitate for maybe a second or so every now and again. It didn't matter if I was flying in a straight line, panning around, internal view or external view, it would just happen. My immediate suspect was REX which can cause me some hesitation when loading the weather, so I took that out of the equation, then removed VOXATC and other addons until I was pretty much back to basic FSX, but still the pauses continued. I even took a spin around Friday Harbour in the trike and the still the hesitation was there albeit slightly less. I thought over exactly what I'd done over the past days and decided that the problem had only started after installing the liveries. It was time to dig deeper, I thought I'd check out what was going on with each aircraft cfg. For those that don't know, the route to these files are:- FSX/SIM OBJECTS/AIRPLANES/PMDG e.g 737/aircraft.cfg. Now a typical aircraft.cfg file is normally 25 to 50kb in size, when I looked at the 737 files they were anything between 25000 to 30000kbs in size! up to a thousand times larger than they should have been! Now that's enough to slow anything down! A normal file is about 25 lines long and ends in the line visual_damage=0. After this line for every livery I had installed was written "For more PMDG liveries look at www.fsxliveries.com livery painted by Wizzardos (2013)" Now, I'm all for some advertising, but this phrase was literally repeated several thousand times, pages and pages of scrolling until I finally reached the livery below. It took me hours and hours of deleting, removing these surplus lines until each file was reduced to the size it should be. Once this was done FSX works perfectly, no more hesitation or stuttering. Now I don't know if multiple downloads caused this to happen, or whether FSXliveries adds these lines intentionally (I wasn't aware of such a problem when I'd been adding liveries piecemeal before) but I all do know is it solved my problem. Sorry FSXliveries, I love your products and have no complaint about the quality of the liveries. I would add that liveries provided by PMDG do not cause any problems. I did much research hoping to find an answer to my dilemma and found nothing remotely like what I've described above so I thought that it was only fair to share this in the forum in the hope that it will help some of you. Now I fully appreciate that most of you have the normal frame rate issues and are always looking for ways to improve performance, so this probably won't be of much use unless you are a livery hoarder like me! But even if you only have 10 liveries in your collection you might be surprised to find some monster files lurking in your aircraft.cfgs. Just reducing those could add a little bit more smoothness. I'd be interested to hear your feedback to know if this has been useful.

Hello everyone. Today I want to share my (curious) experience with FSX with you. Here’s my setup (hardware and software): Motherboard: ASUS Z87-PRO Processor: Intel Core i7-4770K (stock speed and cooling, 3.5GHz) – HyperThreading enabled Videocard: 512MB ATI Radeon HD 4870 manufactured by MSI RAM memory: 1x 8GB Corsair Vengeance Pro Series DDR3 2133MHz (CMY16GX3M2A2133C11) Hard disk 1: 1x 128GB Corsair Force GS SATA3 6 Gb/s SSD Hard disk 2: 1x 500GB 7.200 RPM Samsung Hard Drive Yoke: Saitek Pro Flight Yoke plus one additional Pro Flight Throttle Quadrant unit Joystick: Saitek X52 HOTAS Operating System: Microsoft Windows 7 SP1 Ultimate x64 (installed on the SSD) Flight simulator: Microsoft Flight Simulator X Deluxe Edition + SP1 + Acceleration expansion pack (installed on the 500GB hard drive) Add-ons (that interact directly with the simulator): PMDG Boeing 777-200LR/F + SP1 + 777-300ER expansion, Real Environment Xtreme 4 Texture Direct, Active Sky Next, FS Real Time, FSUIPC 4.929, ORBX FTX Global 1.00 Tweaks: fsx.cfg run through ******* Altuve’s tweaking website (although not advised lately, I still have a 2008 videocard), and applied his Shader 3 mod 1.6 – no external fps limiter, and FSUIPC’s patchsim1friction=Yes for the simulator’s ground friction. It is to note that I still use my Saitek X52’s throttle unit (alone, the stick is stored), because given the fact that I have no pedals, its Y axis (the biggest rotary knob) is the one I use as the plane’s tiller while on the ground, and I use the slider just beneath it for brakes. Everything in this PC is new (March 2014) except the videocard and the 500GB 7.200 RPM hard drive, which date from 2008. I got the Saitek X52 as a gift in 2009, and bought both the Yoke and Throttle Quadrant in 2013. This computer was bought with the idea to improve FSX’s performance, since I previously had a non-overclocked 2.4GHz Intel C2Q 6600, 2x 2GB DDR2 RAM memory modules (all from 2008), and no SSD. I am aware that even though FSX is more CPU-dependant, the videocard is also important when it comes to clouds / addon sceneries, and vital for other videogames, but I preferred to leave the videocard last since it’s the most expensive single component, and my budget didn’t allow me to go that far, so I updated what FSX needs the most first. Of course a new videocard is my next most immediate to-buy item when I can afford it. When I first set everything up – a.k.a. install Windows, FSX and add-ons in the SSD and tweaking - everything was going flawlessly (I even remember posting about it somewhere here), but all of a sudden it became pretty frustrating. Frame rate was high but the stuttering was so severe that it made my flying experience almost un-enjoyable. If the view from the cockpit was stuttering constantly, the outside (locked) spot view was practically unusable due to the even higher amount of stutter going on. What was causing it if it worked so well at first? Tried everything: tweaks, no tweaks (deleting fsx.cfg so the simulator created a new one), playing around with the simulator’s settings, leaving frame rate unlimited in the simulator, limiting them, using an external limiter, deleting FSX from the SSD and re-installing in the hard drive, and anything else a desperate person in need of a decent performance can do. Nothing worked. Only two theories left I had (just to calm myself and reduce the frustration it causes to NOT know what’s going on) were that it was either my videocard doing a bottleneck, which makes sense if we combine a brand new 2014 hardware with a 2008, 512MB videocard, or that it had to do with the clouds and the way Active Sky Next interacted with the simulator. The latter didn’t make much sense though since I experimented stuttering with both Active Sky Next open and closed; therefore, I was keeping the (fake) hope that once I updated my videocard the stuttering issue would be gone and I’d be happy. Not a very encouraging solution since I’m still months away from updating my videocard. Whenever I first run Windows my yoke’s X axis is always offset to the left, so I have to un-plug and re-plug it and it fixes itself. One weird thing I noticed in this PC (which didn’t happen in my previous one) is that whenever I unplugged the yoke (while also having the X52’s throttle and the Throttle Quadrant plugged), its icon in the notification bar took several seconds to disappear, as well as Windows’ sound that plays whenever I plug / unplug any USB device. Seemed as if something got frozen in the meanwhile, but I didn’t give much importance to it. At first I had both X52’s throttle and the additional Throttle Quadrant plugged into the yoke’s rear USB ports, but since I read somewhere that the yoke’s power alone might not suffice the other devices on it unless a power adapter was plugged on it, I preferred to plug each device in a separate USB port in the PC. When both SP1 and 777-300ER were released on the 18th I came back to my simulator (hadn’t touched it since the World Cup started), with the hope I could finally fix the issue so I could enjoy the plane. Since I had already tried anything else I could think of, I remembered the above mentioned USB unplugging freeze, although I always was like “nah, that wouldn’t make sense”. Well, this time it did! In one of my “what if…”’s I decided to unplug the Throttle Quadrant and leave only the yoke (with its default throttle) and X52’s throttle unit and voila! Stuttering disappeared. Vanished. I just couldn’t believe it. Went into the simulator, panned around and the stuttering was gone both in the cockpit and the outside locked spot view. The next day I did an entire flight to make sure it wasn’t just a wrong impression and that stuttering wouldn’t be back. Flight went out flawlessly! Only rare times it had an almost un-noticeable stuttering was when first loading big scenery objects or when focusing on IVAO’s MTL traffic, which is pretty normal. It is so heartwarming to finally have tracked down and fixed such an annoying issue and finally be able to fully enjoy flights! Now I have four questions: 1. Has anyone else experienced a similar issue? 2. If that’s the case, could anyone find a solution to it? I don’t really know if it’s related to the devices or some conflict with the USB ports, since I didn’t experience this in my previous PC. I wouldn't like to ditch my Throtlle Quadrant just for the sake of a better performance, either. 3. Has anyone experienced having any of the yoke’s (or any other device’s) axes offset, and that unplugging / replugging fixes the issue? 4. If that’s the case, could anyone find a solution to that? I suppose it has to do with the drivers, but honestly have no idea. Yes, I know this topic is waaay too long, I just wanted to describe it the most detailed way possible so it’s easier for other people to reproduce. When I found out what was causing me such stuttering I felt so happy that I wanted to share it, and possibly help anyone who might also be experiencing it but has no idea of what is causing it (yet). Thanks to those who actually read it fully! Regards. P.D. I'll also post this topic in AVSIM's "Hardware Controllers & Drivers" section so other people (who might not often access PMDG's section) can also read and comment on it.

Hi all, I seem to have got my sytem's "stutters" under control and thought I'd share a little of what I learned. The problem: I was getting framerates of 50+ though quite erratic but then I'd pan the camera or pull a sharp manoeuvre and I'd get horrible, very brief fps stutters where the image would breifly freeze, jump then be fine until the next manoeuvre. What works for me: I had a look at his page: http://www.prepar3d.com/SDKv2/LearningCenter/getting_started/performance/general_performance_tuning.html - tweaked a little didnt really know what the effects were but got a better understanding of what these entries in the cfg did. Then I looked at this page: http://www.venetubo.com/fsx.html - uploaded my cfg, was not confident enough to paste their suggest cfg file in full as it seemed to not really account for P3d 2.2 but i did however pate the entries it said it had ajusted into my existing Prepar3d.cfg. -- this helped a bit but didnt fully solve the issue Then looked at my Gfx card's control panel. For me, I have 2 crossfired AMD FirePro GPUs (it's the new "trash can" Mac Pro) Here I turned everything to "use application settings" as everyone suggests, turned off "wait for verticle refresh" and "Open GL tripple buffering" and this made the biggest difference; I turned off AMD crossfire's "Frame Pacing" Now almost smooth as silk 40+ framerates in a nice addon AC at a nice Orbx Airport... happy days!

I am very pleased with the NGX so far. It has great performance, no crashes/ CTDs and all the system work as it should (to my knowledge). But there is one problem though that I cant understand. During landing, right before coming down on the runway, the whole sim freezes for about half a second or a bit more,and then resumes without any further problems. This problem is first and foremost aesthetically displeasing as it takes away the pleasure of a smooth and perfect landing.Secondly it is practically very dangerous as it seems to activate, immediately after the freeze, all of the control movements you added during the freeze, resulting in loss of control. Why does it freeze/stutter like that? It seems like something (NGX? FSX?) is loading something to prepare for something during a landing scenario. Maybe there are some special sound files being loaded. Maybe NGX loads some special ground mode files to handle ground operation (like break temperature, wheel steering...) If this is a NGX problem then I hope it will be recognized as a problem and then taken care off. Robert

A poem entitled: Stutterfest I recorded my flights, I got stutters, I run out of disk space, I got stutters, I added an SSD, I maybe got less stutter, I installed 857Gb of photo scenery on my old drive, I got stutters, I increased the overclock, I got stutters, I vacuumed my fans, I got stutters, I increased priority, I got stutters, I edited the registry, I got stutters, I set AffinityMask=4097, I got stutters, I removed my Affinity Mask, I got stutters, I turned off Hyper Threading, I got stutters, I removed unnecessary Simconnect files, it crashed to desktop, I deleted uiautomationcore, it still CTD’s, I installed exception monitoring, I got stutters, I was on a twenty seven hour flight and it hung on final, I increased Bufferpools to 503895765820149585, I got stutters, I decreased Bufferpools to zero, I got stutters, I set fibre frame time to 0.9, I got stutters, I set fibre frame time to 0.1, I got the blurries, I set fibre frame time to 0.0001 but I couldn’t tell if it made a difference or not, I fixed fps, I got stutters, I set unlimited, I got stutters, I fitted a much faster graphics card, I got stutters, I changed something in the BIOS, and it BSOD, I rolled back my drivers, I got stutters, I set more samples, I got stutters, I enhanced application override, I got stutters, I set vsync-something-or-other, I got stutters, I deleted the shader cache, I got stutters, I changed highmemfix and my wheels came back but I had no wings, I edited aircraft.cfg, I got stutters, I certainly never edited dll.xml before I got stutters, I installed a USB hub, I got stutters. I replaced a USB hub with external powered model, I got stutters, I set power management, I got stutters, I installed an airport that has working candy bar dispensing machines with vertically moving belts of assorted snacks, before that I got stutters, I reformatted my textures compression, it got stuttery, I restored my textures, I got microstutter, I sorted all my files into alphabetical order, stutters came back, I defragmented my drives, I got stutters, I took ownership, I got stutters, I gave myself full control, I got stutters, I adjusted UAC, I got stutters, I ran everything as admin, I got stutters, I downloaded a free speed enhancer, I got stutters, I had to install a special version of C++, I got stutters, I had to turn off my annoying AV, I got stutters, I won $10,000,000, but I haven’t heard back yet, I had to repair .NET, I got stutters, I reinstalled Windows, I got stutters.

Hi, I am experiencing jumpy/stuttering camera movements. They appear to hit a regular "clock tick" intervals. So every 1 second of so, the camera appears to stop and then immediately start moving again. This happens when using the middle mouse look, and when switching between presets. Has anyone else had an issue similar to this? I searched the forum but couldn't find anything about this kind of problem. I do not think it is FPS related as it happens at all performance levels. I am using the PMDG 737 in P3D v4 Thanks in advance for any help that can be offered.

Hello, After trying the tweaks posted by Word Not Allowed and the automated tweaking tool from Bojote, my FSX performs pretty well EXCEPT in cities where I have Aerosoft US Cities X installed which are San Francisco and Manhattan. The FPS range at about 6-9 FPS and there are stutters. I don't think my system can't handle it. I know the RADEON HD 6970 is not the best for FSX but I'm trying to figure out what else I can do to to make the sim run smoother in those areas. Any advice/suggestions will be greatly appreciated. My specs are listed on my profile.

Hello to the Avsim FSX Forum. I haven't been here for quite some time. Now that I'm back, I find I could use some of the knowledge that is so prolific in this forum. I had been running FSX on an older 3.6 Ghz Pentium machine with 4 GB of RAM, a standard 7500 rpm hard drive and dual monitors. I got decent performance with the sliders averaging around the "medium" settings. I got some mild stuttering in turns, particularly in high density scenery areas, but all in all, FSX was playable. I just replaced that older computer with a "hot rod" that has an Asus Sabertooth P67 Rev. B3 motherboard, the Intel Corei7-2600 CPU, 6 GB of fast RAM, a Western Digital Raptor 10,000 rpm hard drive, and an Nvidia GeForce GTX560 Ti graphics card. The clock speed of this system is 3.4 Ghz. This computer breezes through 3D games without even breaking a sweat, of course. And then, there's FSX. Surprisingly, it runs so slowly that it's unplayable. I can disable one of the 2 monitors, back all the sliders down to almost 0, use one of the supplied FSX aircraft and get it smooth enough to play it, although it still has the "jitters" in turns. There is something wrong with this picture. I realize that not all of the capabilities of this system actually benefit FSX, but I would certainly expect it to run that program as well, or better than, my older system. Is there a magic bullet I have not discovered, yet, that might keep FSX from bringing this computer to its knees? Are there others out there using the Corei7-2600 CPU and Nvidia GPU that are having similar problems? And, if the Corei7 and Nvidia users are not having those problems, could those users, or anyone else who has some ideas, share their FSX setup with me so I can see what I might be doing wrong? Thanks a lot for whatever help you can give me. I have been out of pocket for quite some time and was looking forward to getting back into FSX. So far, my reintroduction has been a bit disappointing to say the least, but I'm sure there is a workaround somewhere. It's good to be back in the forum. I hope everyone is doing well. Dewey

Hi, I'm really thinking of buying a GTX 1080 or a GTX 1080ti then a 4K monitor. My GTX 1060 6GB is good and can handle even the PMDG 777 at Gatwick with 25fps! However, I get stutters. I have determined that my GTX 1060 6GB is the bottleneck causing these stutters. I can remove these an get a fluid experience by turning on V-sync and triple buffering, leaving fps on unlimed. But, I have to be achieving 60fps (because of my 60Hz monitor) meaning I can only really be smooth with no stutters at cruise. I know you can set to 1/2 refresh rate in Nvidia Inspector and I have tried that. But again it's only smooth if your PC can continuously maintain 30fps, which mine can't. It's very unstable, one minute I'm 40fps then in 16!. So if I get a GTX 1080 would the PC be able to maintain a steady 30fps so I could put 1/2 refresh rate in NI with V-sync on? If and only if I'm still getting stutters, I would buy a 4K monitor and set the refresh rate to 30Hz and do the trick which removes stutters. There is one more way I thought I could remove the stutters. For it to work I would have to maintain 60fps all the time, what kind of immense hardware would I need to provide this? I run Orbx, PMDG, addon scenery so It would have to be beefy! Do you think a GTX 1080ti would cut it? My Pc: i5 8600K @4.7Ghz GTX 1060 6GB upgrading to a GTX 1080. 8GB of RAM (I am switching to 16GB @3000Mhz in March) P3D on a 2TB HHD BenQ GW2270 monitor @60Hz P3D V4 config=https://www.dropbox.com/s/na1dumhjzw5sooo/Prepar3D.cfg?dl=0 Thanks, Ollie. 4K Monitor trick: )

Hi all I am having a stutter at exact same spot in fsx. There are a number of spots in the fsx world where this happens It happens, for instance, when taking of from rwy 33 at the default Aspen airport. When immediately after taking off making a slight left turn, after a couple of seconds there's a stutter. It is always there, whichever plane is use and whatever settings I change in fsx or in Nvidia Inspector...is this something to do with the fsx engine, do other users experience this also and is there a fix? Got a mid range system, with W10, I5 10600K cpu, nvidia 1660 gpu and 16 mb ddr4 memory Thanks for reading

Hi there, ezdock version 1.18 is very choppy and not smooth in p3d 3.4. Choppy meaning it is lagging behind while the game itself is moving at 50 fps. ASN has no affect with it sand I've tried anti virus off. It only gets smooth at 60 fps and above, anything under it chops and lags. Should I upgrade to V2? Anybody know how to fix? Dillon L

Hey all, pretty much what the title says. I will do a flight from point A ---> B and my FPS will gradually start falling, especially at "the end" (approach & landing). However if I exit the game and load back into the destination (or departure) airport, with all of the same settings as before, my FPS is once again "normal". Let me give you an example: I did a VERY short flight (only about 1hr - keep in mind the FPS drop is similar during much longer flights) from LJLJ (Ljubljana, Slovenia - Scenic Routes) ---> LKPR (Prague, Czech Republic - Tailstrike Designs) with the PMDG 737-800. I have a very nice system (5900X, RTX3090, 32GB RAM, 980 Pro, etc. etc.). Anyways, I started with 48 FPS (I have V-Sync enabled and my frames locked at 33 % to avoid conflicts due to a G-Sync monitor) and landed with only about 24ish. After shutdown I decided to disable FSLTL traffic to see if I maybe just need to restart FSLTL Traffic. The FPS only went up to about... 30ish. I then proceeded to close the game and launch it, spawn back in with the same weather, settings and mods (yes, even FSLTL was active), and was getting 46ish FPS.. Basically, I'll usually be getting anywhere from 60-70 FPS with my FPS unlocked and then it drops to anywhere from 40-50 FPS with FSLTL Traffic (for most bigger airports), but never bellow 30 FPS. I try to configure my settings this way, but obviously I don't do hundreds of test flights just to see what kind of drop I should really expecting.. Does anyone know how to mitigate this "issue"? MODS (in this particular case): PMDG 737-800 Scenic Routes – LJLJ Ljubljana Joze Pucnik Airport Tailstrike Designs – LKPR Vaclav Havel Airport Prague FSLTL Traffic FSRealistic FS2Crew PMDG 737 SOP 1 Other apps open during flight: Navigraph Simlink SimToolKitPro

Back in the days of FS98 - 20 years ago - the sim would stutter as you flew over the Prime Meridian in London. With all the advances in flight sim since then I'm really surprised the problem is still there in P3D. I noticed it when slewing across London when testing performance in P3D v3.4. After slewing up to 1500ft at Rwy 28 at London City airport I increased speed to 240kts and started to move towards Canary Wharf. As I approached the buildings P3D stuttered really badly for a couple of seconds. I wondered what could be causing it but finally the penny dropped. The aircraft is crossing the Prime Meridian. I remember FS98 (and maybe even earlier versions) having this problem but I would have thought it would have been solved by now. Looks like the same basic engine is driving P3D as drove FS98 and probably all versions since. It won't happen just in London of course but anywhere where you cross from one hemisphere to the other. Anyone else noticed this?

Hey guys, I have been doing a lot of research online and digging up old threads but our situation and hardware setup is rather unique that I need to turn to the community to get some more outside the box ideas flowing. FSX stutters quit bad even though achieving a very acceptable framerate on the ground FSDT KLAX approx 30 on the ground. I made the PC: Intel i7 3790K 4.40Ghz, 8GB DDR3 Ram, ASUS P8Z77-V, EVGA 670Gtx, 500gb Samsung SSD, Corsair H100. That pc runs a triple head to go, VGA to three displays running at 1280X1024 each, giving a final resolution of 3840X3072. Even though I get 30fps on the ground when taxiing turning, turning in flight, usually short final there are several hiccups to near slideshow effect then it will resume to normal fps again. I have tried a lot of combos with NVI. BP=0, SGSS, 8XSQ, 8XS, no transparency AA, Vsync 1/2, Vsync off, FPS 30 in NVI and unlimited in the sim. Graphics drivers are up to date and current. I am not sure what else to check or do. REX and Texture max load have been decreased down to 1024 REX and 2048 fsx.cfg. I also deleted the shader cache, as well as rebuild a fresh fsx.cfg and re add the necessary tweaks. HIGHMEMFIX, Disable preload, WideViewaspect true, TBM 80, TML 4096 or 2048, nothing else other than that. BP causing artifacting so that's why I remove it. The visuals show just the outside, no 2d panels or VC. So I am really struggling to figure out why this PC is having a hard time with a relatively easy load and low low levels of AA.

Hi all, first of all I would like to say thank you to the whole PMDG team for this awesome product. I started simming with the FS95 more than 20 years ago and since the very first day I was hoping that one day a 747-400 simulation like the one you now created would become possible... So now that "one day" has come... I just cant believe how good it is in every aspect (it looks great, it sounds great, it feels great, documentation is outstanding etc...) Second I would like to report a little issue I found at least on my system: I observed that I got a systematic stutter (fps drop to 7) a few seconds after liftoff at about 30 feet radio altitude. This stutter did always happen when I did a complete preflight. However sometimes when I just went flying without doing all preflight steps it wouldnt occur. This happened regardless of scenery (default and addon), weather and everything else apart from the airplane (but on all models / liveries that I tested) After several days of testing I could finally isolate the problem: And its surprisingly (at least for me) related to the nav and strobe lights.Whenever I take off leaving both lights off, the stutter wont occur, whenever I take off with both lights on it will. I subsequently also found out that this stutter can be triggered even on the ground by switching both lights on and then back to off. As soon as I switch the second one to off, fps will drop to 7...... Additionally I now observed several youtube videos from other simmers and it seems like it might be happening there as well (for exampel here at 1:14 - 1:15) Can someone else verify that? While its not a problem for me any longer because I just can leave those lights off it might be interesting to look into it.... thanks in advance and regards Marinus Gerst

Hi guys, So I'm wondering if someone can help me with this as it's rather frustrating with my PC which is more than capable of running P3D on medium to high settings. The FPS inside the cockpit of the PMDG 777 is around 35-40 FPS which is great, however when it comes to panning around with the camera it seems very "jerky" and stuttery which puts me off completely. It doesn't happen all the time, but mainly whilst on the ground. The only tweak for my P3D cfg that has helped so far is Fiber Frame Time Fraction 0.01. I have tried locking the FPS at 30 which makes the issue a thousand times worse, and only locking at 60 or unlimited makes it slightly better. I've tried enabling and disabling vsync and triple buffering which has very little (if any) effect. I have also tried enabling/disabling vsync, triple buffering, Hyperthreading and Intel Speedstep, all of which make very little (if any) difference at all... How can I get rid of this annoying stutter and get smooth panning inside the cockpit? The problem is completely gone when panning around outside the aircraft. Specs: Intel Core i7 4790k overclocked to 4.4GhZ NVIDIA GeForce GTX 980 16GB Corsair Vengeance RAM Windows 10 pro 64 bit Addons: Active Sky Next GSX Ground Services PMDG 777-200 (Base Pack) FTX Global REX 4 with Soft Clouds Any suggestions would be great guys! -Yorkie

Just wondering if anyone else has seen a long (2-3 second pause) at FSDT KORD and if there is a solution? It ONLY happens at night in my PMDG 777-300ER. I went to FlightBeam's KIAD and the issue was not there. Just at KORD. My Gate was B22. I have not tried it at any other gate at KORD but believe it will occur there too as it happens as I taxi to the takeoff runway too. Very annoying. Looks like it coincides with night lighting that flashes. Thanks for any assistance. Best regards,

Hello everyone, I know that this subject has been adresses hundreds of times but i still i cant find any way to eliminate stutters in fsx even if i have great fps. My fps are locked internally at 30 and i have 1/2 refresh rate vsync with Nvidia inspector. I tried a few teaks to get ridd of those nasty stutters but nothing really worked for me. I also know that each case is different, thats why i am linking here my specs and my cfg. If any body have an idea about how to eliminate or decrease the stutters i would be eternally greatful. Have a nice day ! 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Hello gents. Yes, it's one of the million performance threads you're all so fond of! Shortly explained, I have a nice setup with my current FSX. I've followed 'bout every pinned or highly regarded topic/guide for tweaking, settings, nVidia inspecor, and so forth. I'm overall qutie pleased. BUT, now and then when I'm flying, I have periods of reduced framerates, which just is a pain in my lower back region. I'm currently externally limited to 29 in Inspector (tried other limiters, and other fps-rates as well, with no real change), and FSX's holding that limit just fine. Then suddenly it drops down to 15ish, maybe even dropping down to 10 now and then. It does that for a short while (less then a minute, usually), then pops back up to the limit. This occurs wiithin varying intervals, usually there's between 5 and 15 minutes separating each "inceident". I've googled and browsed and tried to find an answer to this riddle for ages, with no luck. The drops/drags happens regardless of the scenery below or the weather, and it's the same if I fly the NGX or the default C172. Now I'm getting tired of it all, and I turn to the bright minds of this forum to aid me in the search of an sollution. I have the following specs: Hardware: ASUS P6X58D-E, Socket-1366 Intel Core i7 Quad Processor i7-950 Corsair XMS3 DDR3 1600MHz 6GB CL7 GeForce GTX 470 1280MB PhysX Software: Win7 64x Ultimate SP1 FSX with Acceleration CFG File: I'm very happy for all contributions, evne the most elementary ones, as it might well happen I've skipped something vital even though I've used a loong time working this problem.

Folks, I'm a little mystified by what's going on. Some time ago I was running a Dell XGS computer with a 3.6 GB Pentium, 2 GB of RAM, and a 7500 rmp hard drive. FSX had some jittery little stutters in turns, and the frame rate slowed a lot in heavily populated areas. But it was enjoyably flyable.I'm now running the ASUS P-67 Sabretooth mobo @ 3.42 Ghz with a core - i7-2600K cpu, 6 GB of fast RAM, and a 10K rmp hard drive. The sim is almost unflyable. The "stutters" are more like pauses. It is almost impossible to line up with the runway, or even fly with any precision at all. I have the sim on a hard drive by itself, and all of the sliders down to minimum. Not much change, if any - long pauses, jittery turns, sometimes locks on pan.Does anyone have any experience with this particular video card, or this set of symptoms who can shed some light on fixing it? I'm just amazed that hardware with this much capability has actually degraded my performance.Thanks.Dewey

Hi guys, For a couple of weeks now I have noticed that the simulator started to stutter; micro stutters (some sort of a quick back and forward movement) and somehow it is related with the audio (I guess). If I am listening to some music or YouTube videos while running FSX, they will audio-sttuter as well. First I thought it was caused by Active Sky Next, but after making a couple of tests I discovered that ASN was not the problem, so I updated the drivers of the graphics card, disabled the antivirus, lowered the sim to the minimum settings and modified the FSX.cfg (Affinity Mask, Bufferpools, etc.) without success. After testing various configurations with Nvidia Inspector without success I decided to restore the PC to factory state. When I finished installing the simulator according to Nick's Bible, to my surprise, the problem was still there. I'm truly desperate as I don't know what else to do. The computer is fairly new (December) and never had a problem... until now. I'm posting my problem here hoping someone can help me or guide me a bit on this issue. PC specs. are the following. · FSX (SP2). · W7 Professional (64 bit). · Nvidia GeForce GTX 760 Ti OEM · i7-4790 @ 3.60 ·16 GB RAM. Thanks in advance, Andrés.