You are right, the system its not the problem. No matter if someone has a high-end system or a low system, the lags/sutters at the moment of touchdown happen… having a high-end system can help to minimize the problem (the lags dont occur always), but it doesnt mean to be trouble free.
The true is that the FX files and the services files in the sim are not well optimized.
Im so glad to know my fix is helping MSFS users have smooth landings 
meanwhile Asobo fix the problem, hopefully forever.
Nope … Mid range here and I don’t suffer this at all. However I have a very well balanced PC and I don’t use 3rd party apps whatsoever. Also I have very few 3rd party mods, just one airport (EGNS) and a few GA or gliders.
Name a location and I’ll make you a video.
I’ve deleted the touchdown effects files, renamed the ground services folders to OFF and I’m still having touchdown lag.
Today, I landed in a small airport with FBW A320. Zero stutters on approach, ony one traffic aircraft, fps between 50-60. Then, on touchdown, LAG. I redid the same flight with the same aircraft and again, lag.
This is driving me crazy!
I’m beginning to suspect fast ram might be the answer as that’s the only real ‘high end’ hardware I have (CL14@3200MHz, 56ns latency). Make sure you have your XMP profile set.
I have a hunch the touchdown stutter is caused directly from the touchdown sound file being loaded into memory. If the file is too large to be loaded and have its play started comfortably within a single frame, it may be blocking the main thread and stuttering the sim. You can test this by touching down, and if it stutters, lifting the plane off for a second and then touching down again. If it doesn’t stutter the second time, then there’s your likely culprit.
This was a problem going all the way back to FS2002.
If the aircraft you’re experiencing this problem with is using the modern Wwise audio package system, it’s probably not user fixable unfortunately, unless you are comfortable with editing the sound.xml file and replacing the touchdown entries with an external very small file from another aircraft. If it’s using the legacy sound system though, you could try reducing the file size of the existing touchdown sound by lowering its bitrate in an audio editing software.
Developers can prevent this issue by running their touchdown sound effect on a periodic silent loop every few seconds, to keep it fresh in ram and stop it from being garbage collected.
I think my problem is caused by hardware. Two years ago, I bought a cheap 480GB SSD just for MSFS. Only the sim + world updates consumes half of that space and the other half, I already filled with addons. So much so that I am using Addon Linker and putting surplus addons on a HDD. I feel like that might be the culprit for the touchdown lag.
I already bought a faster 1TB SSD, where I will put MSFS and all my addons on it. I saw an older comment, I don’t know if it’s here or in another thread, from someone who reported having solved the touchdown lag issue just by buying a faster SSD, without editing/deleting any files, so I’m hoping that this SSD will solve it.
I also plan to expand my RAM from 16GB to 32GB. It will serve as plan B if the SSD doesn’t solve the issue.
Still no stutters after a couple landings at KBOS today 
Maybe the reinstall did the trick.
Before disabling the FX and services files, I disabled the sound files in the aircraft thinking that the lags could be linked to the sound and the moment of touchdown… even I disabled ALL the sound files but it didnt work, the lags/stutters happened even with all the aircraft sound files disabled.
The problem was solved 100% disabling the fx and services files, but Im talking about my experience because I know every case is different.
Its very intresting what you say and Im sure can halp some users to fix the issue.
I installed my new SSD and took the opportunity to do a complete reinstall of MSFS and my addons.
I haven’t made any modifications to MSFS. I didn’t delete touchdown fx files or rename ground services folders. I’ve done three flights so far and haven’t had touchdown lag on any of them.
I need to do more flights throughout the week before declaring that the SSD has indeed solved my issue, but it’s looking very promising so far.
I recently bought a new PC. Amd ryzen 7 7700x, 4070ti, 16 gb ram, 1tb ssd. The sim will run flawlessly at 80-110 fps the entire flight, but then right when the mains touchdown, it freezes for 1-3 seconds. I have tried many different things and can’t fix the issue. It’s frustrating because even my old pc that would get like 20-30 fps never had this problem. Any help would be appreciated.
I accidentally deleted an effect file. Can someone send me the files or know how to recover them?
Did you check in your recycle bin? the file should be there. If not, do you remember the name of the file?
I wonder if fsuipc could play a role too, as it registers the landing rate for some ACARS…
I’m using LRM (fshub ACARS) to track my flights, so it may be that too…
After reinstalling Windows completely I still get this issue from time to time…
Still had the stutter on touchdown today (at LGAV Mk studios), I was on Vatsim there was not a lot of traffic (I limit it to 20 aircraft in a 40nm range).
So I’ll reduce my TLOD to 100, building and grass to high and OLOD to 150 first and I’ll see about renaming the files.
And I also did a clean install of W11 with Nvidia drivers 531.29.
Maybe DX12 is causing that but I don’t think so as my GPU is barely used (4090), I really don’t want to give up on Frame Generation.
It’s funny I don’t remember having these issues when I had a 3080 and a 5900X (now 5800X3D and 4090)
Hi all. I just found a fix for the upon touchdown pause/stutter for 2-3 seconds. I isolated all possible causes like FSUIPC, FSRealistic…etc. I tried deleting GSX and my problem is fixed. All works fine in my system now. Try it if u run GSX and let me know if it work for you.
Anyone still experiencing this? 4 months later after I posted, I still am stuck dealing with a huge freeze on landing.
I have noticed, the freeze is alot worse in the fenix a320, but the PMDG 737 still gets a freeze.
I deleted the file that added the “OFF” word
The file is nowhere to be found 
I followed this guy’s advice and my stutters on short final have gone.
Edit: I don’t know why that shows as unavailable, as it’s definitely there. Go to Easyjetsimpilot - YouTube and it’s the one about nVidia.
Hey, after nearly scratching my hair out I found my fixed, in addition to the deleted files mentioned by @eduio13 - Make sure road traffic does not exceed 10%. MSFS re-loads ground traffic at touchdown point (??) - Finally smooth landings for me.
This!
I have tried resorting to old drivers, I have tried lowering my settings from ultra, all the way down to low and that did nothing other than allow me to stare at worse graphics during the freezes lol