On 8/22/2025 at 11:57 AM, SayAgain said:

I don't know if your hardware signature is still accurate, but if you are running 64GB RAM, then it's very likely you are swapping to disk which will cause significant stutters.

Awhile back I check for disk swapping when I had 32GB and showed there was some swapping to the page file.  After installing 64GB that went away.  But way more important than that:  I have essentially zero visible 'stutters' now since restarting use of DLSS FG, s/p SU3 where for reasons I have to ascribe to Asobo or MS Windows 11, I no longer have the annoying 2nd screen judder when moving the mouse from main to 2nd screen which is very frequent in my use.  Plus, other elements of FG that caused show-stopping strobing during pan/taxi in high contrast tarmac are nearly gone now as well, and I'm using a GPU driver from early 2025.  So can fly anywhere and in any plane once again and be stutter-free, w/ 64GB of RAM on board.  Just did LFMN > EIDW in the Fenix and nary a stutter the entire flight. 

2 hours ago, RNAVV19R said:

I don't know what this is supposed to show, but you are clearly stuttering.

To show RAM usage and possible explanation why Jeff experienced very bad long frames ... LEMG was where Jeff was having issues with long frames hence why I used that scenery.  I don't have the Fenix A3xx so I used the FSLabs A3xx and also A2A Aerostar 600 to compare memory usage and possible cause of long frames.

Suggest you go back and read thru the posts ... never mention anything not having long frames in my video?

As far as the most demanding, that really depends on many factors, KLAX + Samscene LA doesn't use as much RAM as LEMG and KLAX performance (provided I remove 3 static objects otherwise it will CTD) is about the same as LEMG.

Also didn't get into "Utlra settings", nor TAA nor DLSS nor FG nor TLOD nor vSync nor frame cap etc.

I thought I was pretty clear that more RAM will not increase FPS, more RAM potential is to reduce the Low 1% frequency.  Since I didn't test the same exact scenario on 32GB or 64GB I have no data to compare the Low 1% values.  Also made it pretty clear there are MANY factors that can trigger long frames beyond RAM quantity.

If you're looking for rock solid consistent FPS, then you probably should start a different thread (along with the many others on the same subject) ... there are many ways to make that happen but all will involve some type of compromise.

1 hour ago, Noel said:

I have essentially zero visible 'stutters' now since restarting use of DLSS FG

Sounds good, I'm not a fan of DLSS and FG, too much ghosting and surface reflections don't look correct, unrealistic and dirty during motion (as you can clearly see where FG is struggling for image accuracy from AI generated frames during taxi/takeoff). 

But to each his or her own, a few long frames doesn't bother me, but poor image quality does ... for others they don't notice the subtle image differences that AI generated frames based on prior rendered frames and motion vectors.  Pick your poison.

1 minute ago, SayAgain said:

Sounds good, I'm not a fan of DLSS and FG, too much ghosting and surface reflections don't look correct, unrealistic and dirty during motion (as you can clearly see where FG is struggling for image accuracy from AI generated frames during taxi/takeoff). 

I have been very outspoken here about not using FG (NV DLSS FG, and I use TAA, not DLSS w/ DLAA) as the artifacts were not worth the increased frame rate so I've been NOT using FG in 2024 until just two days ago.  Prior to maybe 2 months ago, not SU3 per se, but SU2 recently as well, I've been able to maintain 50FPS-native almost everywhere in complex planes until the fairly recent past in 2024 when I started seeing rate drop down below 40 in bigger terminals, so went back to try FG again just in the last 2 days and as mentioned was delighted to learn 2nd screen judder is gone and now it's down to modest artifacts compared to previously, so the scale has tipped back to using FG provided tarmacs aren't high contrast.  The trade off is depending on Gsync to help when I can't maintain that desired 50FPS-na.  My guess was the drop in FPS by about 15% is secondary to VRAM 'optimization'.  Not sure how FG would relate to this but until 2 days ago when I retried FG I noticed max VRAM in use dropped substantially over the past few months and with that a corresponding increase in system RAM.  Then, 2 days ago, I saw much higher VRAM in use again, while using FG.

1 hour ago, Noel said:

I have been very outspoken here about not using FG (NV DLSS FG, and I use TAA, not DLSS w/ DLAA) as the artifacts were not worth the increased frame rate so I've been NOT using FG in 2024 until just two days ago.  Prior to maybe 2 months ago, not SU3 per se, but SU2 recently as well, I've been able to maintain 50FPS-native almost everywhere in complex planes until the fairly recent past in 2024 when I started seeing rate drop down below 40 in bigger terminals, so went back to try FG again just in the last 2 days and as mentioned was delighted to learn 2nd screen judder is gone and now it's down to modest artifacts compared to previously, so the scale has tipped back to using FG provided tarmacs aren't high contrast.  The trade off is depending on Gsync to help when I can't maintain that desired 50FPS-na.  My guess was the drop in FPS by about 15% is secondary to VRAM 'optimization'.  Not sure how FG would relate to this but until 2 days ago when I retried FG I noticed max VRAM in use dropped substantially over the past few months and with that a corresponding increase in system RAM.  Then, 2 days ago, I saw much higher VRAM in use again, while using FG.

Noel, I struggle to understand how you're getting such poor performance. You can see from my signature I'm running a similiar(ish) setup as you and I never really dip below 80 FPS. That's using 4K, FG TAA, Premium airport like KLAX, and payware aircraft like Fenix/PMDG/inibuilds. Even during large events on VATSIM and at an airport like KEWR, I still would stay above 60 fps. I don't see any artifacts or ghosting and run my settings between mostly high and ultra with very few at medium. This is for both 2020 and 2024.

Edited August 26, 2025Aug 26 by Keirtt

So I thought I'd load another aircraft, the PMDG 77W for comparison on the stutters.  While I got a few, it WASM'd out...ROFL.

The FNX is the only one that works out of the other two I have (PMDG  77W, ini 350).  PMDG and ini both WASM out almost every time now.

In any case SU3 is borked big time.  They need to hotfix these stutters ASAP.  There weren't these massive stutters on SU2.

Looks like the sim is hangered (AOG) for who knows how long.

Edited August 27, 2025Aug 27 by Jeff Nielsen

1 hour ago, Jeff Nielsen said:

The FNX is the only one that works out of the other two I have (PMDG  77W, ini 350).  PMDG and ini both WASM out almost every time now.

FSLab 3xx hasn’t WASM’d out on me yet, but SU3 and FSLabs seem to have significant hit in FPS and many more long frames than with SU2.  Not sure if it’s Asobo or FSLabs that needs to make adjustments, but I feel confident it can be addressed.  Haven’t tried the PMDG 777 since SU3 yet.  Neither PMDG nor FSLabs have any pending updates … hopefully someone is aware?

Edited August 27, 2025Aug 27 by SayAgain

1 hour ago, SayAgain said:

FSLab 3xx hasn’t WASM’d out on me yet, but SU3 and FSLabs seem to have significant hit in FPS and many more long frames than with SU2.  Not sure if it’s Asobo or FSLabs that needs to make adjustments, but I feel confident it can be addressed.  Haven’t tried the PMDG 777 since SU3 yet.  Neither PMDG nor FSLabs have any pending updates … hopefully someone is aware?

I don't fly the FSLabs Bus, but I can tell you that the PMDG 777's work great for me in MSFS2024.

Jase

11 hours ago, penta_a said:

for the controls, go to the original airplane that you did set the controls for it, (make sure you select a proper device first, like joystick, throttles, pedals, and so on) right click on profile name, there will be a list, one of the choices is make this profile for all aircraft, or something like that.

good luck.

Thank you, pent_a,

I'll try that. I hope it will fix it!

Greetings

The more I fly SU3 the more I'm convinced that past predictions of "SU4 should've been released as V1.0" was spot on, the performance is all over the place which is a main issue, no two identical flights are the same, VRAM still not being utilised correctly, the streaming of textures is still at times very poor (albeit rarely) and no it's not my connection(!). There's a fair few other niggles, frustrations and stuff, so hopefully SU4 irons those out and they actually bring in some optimisation and solid LOD improvements which they're still struggling with after 5 years.

I'll persevere however as SU3 is on the brink of being good enough to tread carefully with as some flights are just about good enough, the main drawback being the poor implementation of DX12 which I point too as the main cause for concern. It simply should not be performing this badly and still be in beta for 2020.....says it all!

Fenix is butter smooth. Finally back on my main system and loving Su3 so far. 

SU 3 is working very nicely here on both pc’s.

Performance is very good.

4 hours ago, John Fields said:

Thank you, pent_a,

I'll try that. I hope it will fix it!

Greetings

just a correction for my self, I'm not in front of my PC now, but I think there is a gear symbol right to profile name, left click it for full down list of selections, I hope I'm correct this time.

2 hours ago, GSalden said:

SU 3 is working very nicely here on both pc’s.

Performance is very good.

What drivers are you using? Particularly for the 4080.

Thanks!

13 hours ago, Keirtt said:

Noel, I struggle to understand how you're getting such poor performance. You can see from my signature I'm running a similiar(ish) setup as you and I never really dip below 80 FPS. That's using 4K, FG TAA, Premium airport like KLAX, and payware aircraft like Fenix/PMDG/inibuilds. Even during large events on VATSIM and at an airport like KEWR, I still would stay above 60 fps. I don't see any artifacts or ghosting and run my settings between mostly high and ultra with very few at medium. This is for both 2020 and 2024.

Hi Keirtt, looks like you're referring to using FG, I wasn't when reporting frame rates.  I have no problem maintaining at least 80FPS-fg everywhere.  I just have noticed somewhat recently running w/o FG can dip down to the low 40's is about it, which would be mid 80's w/ FG.