What I find strange is the inconsistency of this stuttering / sudden low FPS problem.

KSEA (mkstudios) and Flysimware C414A  all settings high or ultra TLOD@305  OLOD@200  

Free Flight on RWY 16L

Three sessions in a row I see 60 FPS with almost no variation on takeoff and flight over Seattle ( Drzewiecki Design) at 4,000'

Then on next session, with no changes at all to anything, I get 2 to 4 FPS the instant the plane begins to move.  And, the FPS does not recover until level off at 10,000'

Or - take off at 60 FPS, flight a circuit and land on same runway - FPS solid 60 until over the threshold and then drops to 2 but recovers as soon as plane stops moving.

Using nVidia nSight Systems  - I can see that every thread in Flight Sim is blocked for several seconds at a time during the low FPS.  The ntosknl.exe (fundamental Windows kernel process managing, among other things:Memory) is also blocked for several seconds at a time during low FPS.  During high FPS periods all the same blocking occurs but each block / wait for user object only lasts a few micro-seconds - not the whole seconds during low FPS.

So - what causes the blocking?

nVidia nSight Graphics is designed to answer exactly that question but I cannot get Graphics to run on my  FS 2024 machine/process.

4 hours ago, Bill A said:

And when it comes to graphic settings, my settings are lower for testing purposes than what most folks are streaming videos of FS24 on Twitch or YouTube with similar specs and have no issues.

With my system specs on my signature, I shouldn't have to set my graphic settings to low and medium settings. Also all shadow settings are set to the lowest value and have airport traffic set to off and fauna. 

Hey Bill. Based on your photo, I assume your profession is a pilot, and not software development, right?

So in software development (yes, I have done software development as a profession), we have a concept called "minimal reproducible example."  The idea is, you want to exclude as much complexity as you can, so that you can isolate. The keyword here is, "isolate."  By excluding everything else, and isolating, you can troubleshoot and fix software much faster.  You can read about the Wikipedia definition of "Minimal reproducible example" here: https://en.wikipedia.org/wiki/Minimal_reproducible_example#:~:text=In computing%2C a minimal reproducible,to be demonstrated and reproduced.

For example, let's say you have a top end graphics card like the NVidia 5090 and you should be able to run any game, at 4K, at Ultra, with your NVidia 5090.  The brand of your NVidia 5090 is Asus and it comes with hardware acceleration for Ray Tracing.  And for 99.9% of the games out there, using the latest NVidia driver, there isn't an issue when the Asus 5090 uses the hardware acceleration for Ray Tracing. And the Asus 5090 even works normally in MSFS 2024 with hardware acceleration for Ray Tracing.  But a specific add-on, for whatever reason, causes the Asus 5090 to glitch with hardware acceleration for Ray Tracing in MSFS 2024, and MSFS 2024 heavily stutters when the combination of that specific add-on, is used in conjunction with the Asus 5090, and MSFS 2024. And this only happens with that specific add-on and an Asus 5090, and it doesn't happen with any other brand that sells the NVidia 5090.  

And in the example above, if you turned all your graphics settings down, including disabling Ray Tracing, the stutters would go away. But you wouldn't know about this in the first place, because you kept all the complexity in your graphics settings, rather than simplifying so that you can isolate.

This is why we use the concept of "minimal reproducible example" when troubleshooting software, in the software development industry.

I hope you get this concept. It's very useful for troubleshooting software and troubleshooting games on your PC.  My suggestion from above is an example of creating a "minimal reproducible example," exactly as we do in the software development industry.

And this goes for anybody else trying to troubleshoot MSFS, or troubleshoot your other games (or even troubleshoot any software) on your PC.  You want do create a "minimal reproducible example" and isolate - it will help you find fixes to your games and software, much faster than if you go the other way, and you don't simplify and isolate.

Edited June 13, 2025Jun 13 by abrams_tank

12 hours ago, Bill A said:

Im not one to vent within the flight sim community and Ive been around since those FS4 days in the mid 90s. MSFS2020 runs great on my machine and there are a just a very few moments FS24 runs "good" for its state. Why has this issue with what seems to be server latency or whatever it is making my flying and i know many others complete useless in FS24. There is a topic already posted on this and has many many votes and I know its being "investigated". I have attached a video of my flight over Los Angeles area. This is complete BS that many of us are still dealing with this issue and totally making at least for me a unflyable flight experience. My system specs are just fine for this sim, and I have seen many streamers with my video card, my CPU, and with only 32Gigs of memory not 64Gigs not having any of these issues.  My graphic settings are mostly high with some medium, tried TAA, DLSS with no change. Tried new drivers, older drivers with clean installs, updated audio drivers...updated chipsets and firmware for my system. Still the issues are still there. Resizable BAR on and off, makes no difference. No other game I have on my system has this issue but FS24. I hope Beta 3 has a priority on getting this issue resolved and lower the priority on planes, and other items that are not related to the foundation of the platform to get the performance improved. Now on the other hand, if someone in the forums takes a look at this video and can help with my my frames can be a solid 40 and then tank to 1, 5....15...20 then back to 40 even when Im at a very very high altitude, I would appreciate it. Now in the video I also turned off BATC to rule that out...and nope, it was just as bad with out it. Im at a complete loss with 24 and cant fly it. Also tried rolling cache off, 16, 32, 64 and now 128 running on my NVME drive with same results.

 

ok, Im, done, just really disappointed since the flight started so good, smooth on the ground, and after departing and climbing over 2000ft, it begins with this mess.

 

 

Your issue is not with the drivers, or Asobo, it's with the Video Card specific firmware. I had this exact same problem which made both '20 and '24 unflyable and it happened all of a sudden a few months back and I could not fly MSFS at all. I even built a new system with Windows 11 from scratch and just installed MSFS keeping the same video card (Asus 5080), but had the exact same issue, leading me to believe it must be the video card.

I then discovered that there were a bunch of firmware and Asus specific video card updates. After updating, all the stutters went away and performance in '24 is monumentally better than '20. Then with the next NVIDIA driver update the stutters started coming back again. A few days later ASUS released another card update and it went away, performance is stunning.

So at least for me this what the fix after months of frustration. 

Edited June 13, 2025Jun 13 by Mike T

4 hours ago, Tuskin38 said:

Those aircraft are not made by Asobo, so they’re not taking dev time away from the sim. Same with the POIs and airports in world updates, those are all made by third parties.

and the rest of your statement is equally bull. They’ve released a ton of fixes since launch.

They're not even working on new features right now. The next couple sim updates are solely focused on fixes 

that was easy

 

got him 🙂 

Then good, all with this issue shall all see this frame rate and audio issue resolved. 🤔

47 minutes ago, Mike T said:

Your issue is not with the drivers, or Asobo, it's with the Video Card specific firmware. I had this exact same problem which made both '20 and '24 unflyable and it happened all of a sudden a few months back and I could not fly MSFS at all. I even built a new system with Windows 11 from scratch and just installed MSFS keeping the same video card (Asus 5080), but had the exact same issue, leading me to believe it must be the video card.

I then discovered that there were a bunch of firmware and Asus specific video card updates. After updating, all the stutters went away and performance in '24 is monumentally better than '20. Then with the next NVIDIA driver update the stutters started coming back again. A few days later ASUS released another card update and it went away, performance is stunning.

So at least for me this what the fix after months of frustration. 

Where do you find these firmware for specific video cards? 

15 minutes ago, spearmint_flyer said:

Where do you find these firmware for specific video cards? 

For me it is Asus Crate Utility. For some reason my Video Card wasn't set up correctly in there so it gave me no updates until I fixed it and then I saw updates going back to 11/24. Otherwise go to your card MFG website and search for your card and then firmware / software. 

This is an often overlooked step because one assumes that all you need is the NVIDA drivers but that is often not true since many cards have other components that need regular updates. At the very least it won't hurt anything and if you're having these stutters / sound pops it is worth a try.

Edited June 13, 2025Jun 13 by Mike T

18 minutes ago, Mike T said:

my Video Card wasn't set up correctly in there so it gave me no updates until I fixed it

Fixed it how, exactly?

2 hours ago, CarlosF said:

My post wasn't meant for you...move on.

It's an open discussion forum. There's no rules stating I can't respond.

There’s a lot of snake oil advice in this thread that I’d personally stay away from, it could end up messing up your system.

There’s a massive thread on the official forums about this issue, and it’s not hardware related. It’s either the sim itself, the servers, or both. We’ll just have to wait until the team figures it out and fixes it.

17 hours ago, Bill A said:

I have attached a video of my flight over Los Angeles area.

Hi Bill, it is not clear to me if this is only happening in the LA area...  I recall that KSEA was really bad in the early 2020 days, but that seems to have gone away.   Is this happening to you everywhere, or have you identified this one area that brings your system to its knees?  

I always wonder if the scenery gets changed in the background is it in synch with the cache or is it synching or can it synch?

dd

 

9 hours ago, Bill A said:

Keep this conversation alive folks. All the suggestions that have been mentioned,  already tried. I have tried a very large cache of 200 and no luck..

And when it comes to graphic settings, my settings are lower for testing purposes than what most folks are streaming videos of FS24 on Twitch or YouTube with similar specs and have no issues.

With my system specs on my signature, I shouldn't have to set my graphic settings to low and medium settings. Also all shadow settings are set to the lowest value and have airport traffic set to off and fauna. 

I'd stress-test the RAM too, if no one has mentioned this.

And let me add another possibiity to this.  Someone alluded to it earlier in the thread (referencing nvidia audio, Armoury Crate, etc.)

I had this problem with MSFS2020 once, with my old 3080ti-based rig, and it was resolved when I installed a discrete sound card (SoundBlaster of some sort, can't remember which exact model).  I concluded that certain motherboard/BIOS/chipset/Realtek etc. sound combinations do not work well together...and you might have one of them.   Separate sound cards aren't that expensive and it's worth trying given your severe situation.  You have to really careful with onboard (motherboard) audio drivers these days.

I'd also contend that may well NOT be a strictly 2024 issue, as I had the same thing happen to me with 2020.  I'd be really interested if you solve it so post up if you do.  It is exasperating I know.

I do have a sound blaster sound card. Thinking the sound card would eliminate this issue unfortunately it did not. I have also disabled all sounds and left the sound blaster enabled. I also get his issue a departing KBOI

I have never experienced this stutter issue in 2020. The only other time I’ve had audio stutters like this was when I was streaming a 4K movie and my browser became unresponsive while my CPU hit 99%. That’s exactly what’s happening with 2024 now. Instead of a CTD, the sim keeps running but the audio stutters badly. It’s classic CPU overutilization. When your processor is pinned like that, it doesn’t have enough headroom left for real time audio, which leads to crackling or dropouts. It’s not hardware failure, it’s just your system choking under the load.