Prepar3D v5.3 Bad Performance

[zdvet]

Had this experience with both the FSLabs and NGXu. But also had a smooth flight with both.

[Martyson]

Had this experience with both the FSLabs and NGXu. But also had a smooth flight with both.

@ zdvet ,

If you report your poor performance problem on the other developers support forums you can then see if other pilots are having the same problem.

[Anton Vind]

Finally found out what causes low performance for me. It's the Volumetric Clouds setting that I have on Ultra. On v5.2 that was no problem, on v5.3 that kills a lot of fps for some reason. EA enabled on both.

[snapshot21]

Im also having performance issues that were not present in v5.2.

Flights start off fine, perfectly smooth and high FPS. But once in cruise or about 1 hr into the flight. The microstutters and low FPS happen and it is present all the way to the destination.

[Anton Vind]

LM must have messed something up/at least made changes to something since performance can differ so much under the same settings. Hopefully they'll have a look at it, I basically can't fly until this is resolved. How unfortunate that the 5.2 installer doesn't exist anymore.

[medic89]

I experienced the same huge FPS drop as well as blacked out textures. I updated client, then content and scenery and cleared the shader cache. But with this huge performance problems, I switched back to the 5.2 client, and now everything(!) is back to normal again. So I guess there is something odd inside the 5.3 client.

[Anton Vind]

I tried to revert to v5.2 client, but still have performance issues. So I guess it lies within content or scenery. It turned out to be Volumetric Clouds that cause bad performance for me. I used to be able to have them on Ultra without getting low fps, but in 5.3 I get low fps on Ultra, so now they're on Medium.

[Phillip2]

Absolutely terrible framerates with this new 5.3. What the heck have you done of fatal mistakes this time?!
AGAIN a lot of waste of time for your customers since you back then, for some strange reason, suddenly chose to start all over from scratch!
Now have to implement a total image harddisk restore back to 5.2 - which, at least, is not THAT immature as this 5.3.
Cracky!

[Senchay]

edited

[BAWV12]

I did not observed performance drop after upgrade from 5.2HF1 to v5.3. I have road traffic density on zero, use EA mode with legacy ASCA clouds. I tested volumetric clouds, yes, there is fps drop, where v5.2HF1 can do 30 fps on MEDIUM, v5.3 needs LOW for same fps. But nasty artifacts on the terrain boundary vs clouds known from previous versions are gone.

[Anton Vind]

Unfortunate that Volumetric Clouds are now more demanding, I don't really like the setting at Medium. They wrote that performance had been optimized when it came to clouds so it's kinda disappointing.

[guiduz]

On both FSLABS and PMDG at cruise level the frame rate drops inexplicably and the simulator is completely unusable.
The odd thing is that before getting to cruising altitude everything works splendidly.
We were doing just fine on the 5.2 with the exact same settings and addons.

[Senchay]

I did another flight and had no issues... restarted the computer and did another, now having the issue again. Issue is so abrupt and choppy that it gave me motion sickness. Frames are about 1 frame every 3 seconds and causes the aircraft to sway back and forth fairly violently.

Turned graphics down the graphics down as low as I could with no improvement, VRAM usage is at 4.2-4.5/9.1

Video for demonstration: https://youtu.be/3fCRpFxRVEg - AP was on the whole time until the nosedive at the end kicked it off.

Specs:
Intel i9-10900KF
NVidia 3080
32gb ram
Windows 10
Installed on SSD

I've had issue with the following addons, but also not had the issue with these same addons....
FSLabs 320
PMDG 737
ActiveSky
SimToolKit
Navigraph Charts
Chaseplane
FlyTampa CYYZ
FlightBeam KMSP
Simaddons CYQM

Users here experience the same. Seems yours fits that one. Maybe you check your gpu usage too?

https://www.prepar3d.com/forum/viewtopi ... 01#p250401

[martinr8]

Absolutely terrible framerates with this new 5.3. What the heck have you done of fatal mistakes this time?!
AGAIN a lot of waste of time for your customers since you back then, for some strange reason, suddenly chose to start all over from scratch!

Confirm that. Performance is nowhere near 4.5. Much more stuttering than previously and severe FPS drops on descent and landing (last flight was 15 - 20 fps in default scenery, however the climb and cruise was still OK) with the same settings as before. Strangely enough, that fps drop happens in some flights only, others are OK. I will return to 4.5 until the latest version has matured a bit. No idea what they did to deretiorate that much.

[JorgenSA]

Martinr8,

What are your hardware specifications? Version 5.3 (and I do hope it is 5.3 HF2 you are talking about) does place much higher demands on your hardware than v. 4.5.

Jorgen