The weird thing is, outside of the hitching, FS24 runs like a dream...so incredibly smooth. At KSFO in the PMDG with BATC or S.ai traffic, it's silky smooth...and i mean, really really smooth. It stays this way until around 3000 feet. Same goes for KSEA, KLAX. Then I start getting really bad hitching and stuttering...for a few moments, then it smooths out again. The cycle repeats smooth, stutter, smooth, stutter. If I'm flying a slower plane, it's non existent, the whole experience is very smooth. I thought it was because of using a complex plane, but if it was that, it wouldn't make sense that the scene is so smooth while on the ground...that's usually where it's heaviest.

I'm wondering why this is happening. Monitoring my system, the CPU will spike for a second, then go back to normal. I'm wondering if it's the download speed of the tiles and PG. Tried disabling PG, and the stuttering was definitely reduced, but was still there. Tried using the map enhancement tool...couldn't really notice any difference..but this was with PG enabled. Internet speed is excellent, but at this point, it really seems like there's something going on with loading the tiles and PG. It's almost like the sim pauses while loading a new batch of downloaded tiles. ChatGPT suggested that turning the "Precached scenery" down to High as opposed to having it at Ultra. Haven't tried that yet, but will next load.

I'm in the beta, but this was happening with the live version as well. Actually joined the beta to see if it would remedy the problem. If anyone has any suggestions or is experiencing anything similar, i'd really appreciate your input.

5 minutes ago, V1ROTA7E said:

The weird thing is, outside of the hitching, FS24 runs like a dream...so incredibly smooth. At KSFO in the PMDG with BATC or S.ai traffic, it's silky smooth...and i mean, really really smooth. It stays this way until around 3000 feet. Same goes for KSEA, KLAX. Then I start getting really bad hitching and stuttering...for a few moments, then it smooths out again. The cycle repeats smooth, stutter, smooth, stutter. If I'm flying a slower plane, it's non existent, the whole experience is very smooth. I thought it was because of using a complex plane, but if it was that, it wouldn't make sense that the scene is so smooth while on the ground...that's usually where it's heaviest.

I'm wondering why this is happening. Monitoring my system, the CPU will spike for a second, then go back to normal. I'm wondering if it's the download speed of the tiles and PG. Tried disabling PG, and the stuttering was definitely reduced, but was still there. Tried using the map enhancement tool...couldn't really notice any difference..but this was with PG enabled. Internet speed is excellent, but at this point, it really seems like there's something going on with loading the tiles and PG. It's almost like the sim pauses while loading a new batch of downloaded tiles. ChatGPT suggested that turning the "Precached scenery" down to High as opposed to having it at Ultra. Haven't tried that yet, but will next load.

I'm in the beta, but this was happening with the live version as well. Actually joined the beta to see if it would remedy the problem. If anyone has any suggestions or is experiencing anything similar, i'd really appreciate your input.

Try deleting rolling cache file, start the sim, increase rolling cache to something around 50gb. Close the sim, restart and fly. 

This solves the stuttering and sound glitches. 

Cause 

As soon as the sim starts to write at a full rolling cache file, overwrite it, it happens .

6 minutes ago, mpo910 said:

Try deleting rolling cache file, start the sim, increase rolling cache to something around 50gb. Close the sim, restart and fly. 

This solves the stuttering and sound glitches. 

Cause 

As soon as the sim starts to write at a full rolling cache file, overwrite it, it happens .

Thanks for the reply. This was with a fresh Rolling Cache set at 150GB. I wanted there to be enough room so that it wouldn't run into the issue you've described.

6 minutes ago, mpo910 said:

Try deleting rolling cache file, start the sim, increase rolling cache to something around 50gb. Close the sim, restart and fly. 

This solves the stuttering and sound glitches. 

Cause 

As soon as the sim starts to write at a full rolling cache file, overwrite it, it happens .

Thanks for the reply. This was with a fresh Rolling Cache set at 150GB. I wanted there to be enough room so that it wouldn't run into the issue you've described.

This is a widespread issue affecting both MSFS 2020 and 2024 since Windows 11 24H2.

Not sure if the developors have ack'd it but it's affecting many. I noticed improvement after enabling SMT in the BIOS.

4 hours ago, DModjo said:

This is a widespread issue affecting both MSFS 2020 and 2024 since Windows 11 24H2.

Not sure if the developors have ack'd it but it's affecting many. I noticed improvement after enabling SMT in the BIOS.

Thank you! Will try it out

What's SMT?

Me too, but I looked it up.
 

Quote

 

SMT in BIOS
Simultaneous Multithreading (SMT) is a feature found in modern processors, allowing multiple independent threads to execute simultaneously on one CPU core. It can be enabled or disabled in the BIOS settings of a computer.

Disabling SMT can sometimes yield slight performance gains, particularly in certain gaming scenarios, but it is generally not recommended for most users. Some users have reported improved performance in specific games like Call of Duty: WWII and Stellaris when SMT was disabled, but these cases are rare and not universally applicable.

For AMD processors, SMT is often well-optimized and can provide better overall performance when enabled. Disabling it may lead to performance losses in some applications.

If you need to disable SMT, you can do so by entering the BIOS settings during boot-up and toggling the SMT or Hyper-Threading enable/disable option. For more detailed instructions, you can refer to specific guides or videos for your motherboard model.

In some specialized cases, such as with certain versions of Microsoft Windows Server, disabling SMT might be necessary for the operating system to boot successfully.

In summary, while disabling SMT can sometimes offer minor performance benefits, it is generally recommended to leave it enabled for optimal system performance.

 

 

12 hours ago, V1ROTA7E said:

Thanks for the reply. This was with a fresh Rolling Cache set at 150GB. I wanted there to be enough room so that it wouldn't run into the issue you've described.

You may want to turn your Rolling Cache down to 64 GB, I have seen user reports that big RC sizes are problematic.  Personally on my config I didn't have any problem with a big RC (128 gb) but consider a lower size for troubleshooting purposes.

Also you should monitor your vram (using Developer Mode info screen).  If you run out of vram, you can get really bad stuttering.   Terrain precache to Ultra can help, IF you have the vram.  If you do not, then it will probably do more harm than good.  I am not sure if disabling SMT will help you, but it's worth trying if all of the above fails.   I would remove all from the Community folder and start testing from there.  If it stutters with an empty folder, you know it's not an add-on.  Good move disabling PG, at least for now, for testing purposes, it removes a variable.  Also look at turning down Glass Cockpit Refresh Rate for testing purposes, it's currently a known detriment to performance.

Note that beta builds contain telemetry code that can reduce performance...if troubleshooting I'd want to be running the current regular build (i.e. SU1) and not the beta, but that's just me.  I mean no point in solving a problem in beta SU2, only to have to solve it AGAIN once the real release SU2 drops.  Actual release SU2 could respond markedly different to the current beta SU2...not saying it will, but just pointing out the possibility.

hope the above helps...

" The weird thing is, outside of the hitching, FS24 runs like a dream...so incredibly smooth. At KSFO in the PMDG with BATC or S.ai traffic, it's silky smooth...and i mean, really really smooth. It stays this way until around 3000 feet. Same goes for KSEA, KLAX. Then I start getting really bad hitching and stuttering...for a few moments, then it smooths out again."

I'm using 2024. I always get this problem if HAGS is OFF. I never get this if HAGS is On. I think one reason is that 2024 is DX12 only.

5090 is plagued with problems and nVidia can’t seem to get the drivers working correctly or there is a more significant design issue with the hardware.  I would try to download older (going back to Jan) drivers and see if that helps.  Assume you have all your ROPS and no cable overheating issues?  I believe ASUS has some 5090 that monitor voltage and will auto reduce frequency/performance if things get too hot.

If HAGS off helps, then it could be server load issue or ISP connection issue.

IMHO, HAGS off defeats the purpose of using MSFS.

EDIT: make sure you have the latest AMD chipset drivers and latest EFI for your motherboard (frequently updated for AM5 X870E.

Edited May 7, 20251 yr by CO2Neutral

my HAGS is on and RC is at meager 16GB, I see no stutters at all. currently in the Fenix after 2 flights LOWI - LFBZ and LFBZ - LEIB

just saying even if this may not help the OP

20 hours ago, Reader said:

Me too, but I looked it up.
 

 

I've already played with hyperthreading on/off, don't really see a difference to be honest.

14 hours ago, Fielder said:

" The weird thing is, outside of the hitching, FS24 runs like a dream...so incredibly smooth. At KSFO in the PMDG with BATC or S.ai traffic, it's silky smooth...and i mean, really really smooth. It stays this way until around 3000 feet. Same goes for KSEA, KLAX. Then I start getting really bad hitching and stuttering...for a few moments, then it smooths out again."

I'm using 2024. I always get this problem if HAGS is OFF. I never get this if HAGS is On. I think one reason is that 2024 is DX12 only.

I think you need HAGS on if you use frame gen.... native frame gen at least.

OP complained of hitching. In MSFS 2024, I get what I would call hitching if HAGS is off. Always, every flight. I do not get hitching if HAGS is on. This is true if I use either native FG or if I use Lossless scaling FG.

When hitching is occurring, the fps does not vary but stays constant and smooth, while the image nevertheless jumps (hitches).  So it looks something like stutters, but it isn't. The image jumps along for a couple seconds or so and then all is well for awhile, and then it happens again.

There are lots of YT MSFS help videos advising to turn HAGS off. That used to be the preferred setting and it improved performance. But now in the era of msfs2024, that is no longer true, HAGS should be on if you are using either native FG or LosslessScaling FG. I think this is because now everyone has to use DX12 (in MSFS 2024), but maybe it's another reason.