Horrible performances & fps fluctuations
Posted: Thu Jun 11, 2020 12:10 pm
Hello there,
I've just got the King from orbx and sadly I must say my first try was really disappointing as the performance were absolutely horrible
Not that it was low in terms of fps, but the fps fluctuates to a point that it creates stutters, it does not feel smooth at all and it's pretty unflyable.
I could not solve the issue but I am so much eager to fly this bird that I would not want to ask a refund without trying everything first.
[*]First of all here are my PC specs:
AMD Ryzen 3800x @4.5Ghz
16Gb G.Skills Neo @3600mhz - CAS 16
MSI RTX 2070 Super Armor OC 8Gb
P3D and all add-ons are located on Samsung 860 EVO SSDs
Win10 1909
[*] I'm using the latest version of P3D v4.5 (HF3) and my install is quite recent as I reinstalled everything when HF3 was released.
[*] I know this is usually not very helpful to say that but this is honestly the first time I'm seeing such a bad performance with a 3rd party aircraft, even my FSlabs runs smoothly at 30 fps (locked at 31 internally and externally for better smoothness) most of the time on very large airports but here the fps fluctuate from 15 to 30.
[*] I'm running many orbx sceneries and quite many other sceneried but I manage that on the clean way, deactivating anything uneeded for my current flights but keeping in mind any dependencies. Being a dev I quite know what I'm doing on that side so it should not be the issue.
[*] My P3D settings are pretty much on the performance side and I rarely have long-frames. It's pretty optimized for pretty much any situations as I'm using a single config setting for any kind of flying from the C172 on a small grass airfield to the 747-400 flying from KLAX to EGLL.
[*]What I've tried so far:
* Reducing RealLight and Trueglass resolution in the dedicated xml files without much result
* Disabling Render to transparent surfaces does not help at all
* Removing my affinity mask in the cfg did not help either
* Removing any Nvidia Inspector "smoothness tweaks" did not help
* Unlimiting fps in P3D settings makes the fluctuations even worse (maximum fps goes up to 45 at Orbx KSAN but still fluctuates down to 15/20)
* Decreasing P3D scenery settings by 1 then 2 notch down did not help (I would not consider this as a final solution anyways considering my PC specs)
* Reducing P3D lighting settings (shadows to low, dynamic reflection off) did not help
* Reducing P3D display settings (Max texture resolution, Antialiasing off, FXAA off, no anisotropic filtering etc...) gave the same results
* Disabling dynamic lighting did not help
* Disabling trueglass did not help
* Turning UTlive OFF didn't help
* I'm using Envshade but restoring default shaders did not help
* Disabling most of my 3rd party addons that could possibly conflict (exe and dlls) did not help
* Renaming the folders "_low" in the aircraft folder in order to use these instead of the standard ones did not help
* Installing the low res version provided on this forum instead of the orbx version gave the same results
* Running the KA350 exclusively from default airports: yes the fluctuations are less obvious with fps locked at 30 but it's still less smooth than any other aircraft and not being able to fly this beauty on 3rd party sceneries definitely is a no go for me
* Changing the pixel size value from 2048 to 1024 to each Vcockpit entry in the panel.cfg did not help
* Using the provided legacy gauges did not help
* Checking the VRAM usage : between 70% to 75% , 3rd party scenery or default airport does not seem to change much the VRAM usage.
* Fluctuations are more obvious when panning, especially when looking at the gauges in the cockpit
* Fluctuations are much less visible in external views but still there
* As soon as cockpit displays are off, fluctuations are much less obvious but still there
* My cpu cores do not seem to be saturated and looks to be used as usual by the sim, core 0 is not even totally full
* My GPU usage remains at 40/50% as usual
*EDIT: I have also attempted a quick flight to see if it would be okay during cruise over water, but even this did not help either
Here is a video showing the fluctuations and the very laggy panning and movements:
https://youtu.be/xMtTQ51En-s
Here is the exact same test with the PMDG 737 NGXu which was the most heavy aircraft with the FSL A32X on my PC until now:
https://youtu.be/0kFovFgSccM
These videos probably won't help you but you'll see that there is definitely something wrong here with my install of the 350i as the same test in the same conditions provide a butter smooth experience with one of the heaviest 3rd party aircraft nowadays.
After reducing pretty much every single P3D setting to find the culprit and getting my P3Dv4 looking like a FS2002 without getting any kind of positive result I'm pretty much out of ideas now,
Even trying on a default airport with all the tests performed above does not bring much more smoothness as I even been able to see some fps jump from 60 to 10 with unlimited fps ! Panning feels like a power point with so much fluctuations.
I'm pretty sure this comes from the Aircraft, may be this only happen in some specific configurations but I've never experienced such bad performances before. I'd be glad to test anything else so any suggestion would be much appreciated
Thanks by advance,
Maxime
I've just got the King from orbx and sadly I must say my first try was really disappointing as the performance were absolutely horrible

Not that it was low in terms of fps, but the fps fluctuates to a point that it creates stutters, it does not feel smooth at all and it's pretty unflyable.
I could not solve the issue but I am so much eager to fly this bird that I would not want to ask a refund without trying everything first.
[*]First of all here are my PC specs:
AMD Ryzen 3800x @4.5Ghz
16Gb G.Skills Neo @3600mhz - CAS 16
MSI RTX 2070 Super Armor OC 8Gb
P3D and all add-ons are located on Samsung 860 EVO SSDs
Win10 1909
[*] I'm using the latest version of P3D v4.5 (HF3) and my install is quite recent as I reinstalled everything when HF3 was released.
[*] I know this is usually not very helpful to say that but this is honestly the first time I'm seeing such a bad performance with a 3rd party aircraft, even my FSlabs runs smoothly at 30 fps (locked at 31 internally and externally for better smoothness) most of the time on very large airports but here the fps fluctuate from 15 to 30.
[*] I'm running many orbx sceneries and quite many other sceneried but I manage that on the clean way, deactivating anything uneeded for my current flights but keeping in mind any dependencies. Being a dev I quite know what I'm doing on that side so it should not be the issue.
[*] My P3D settings are pretty much on the performance side and I rarely have long-frames. It's pretty optimized for pretty much any situations as I'm using a single config setting for any kind of flying from the C172 on a small grass airfield to the 747-400 flying from KLAX to EGLL.
[*]What I've tried so far:
* Reducing RealLight and Trueglass resolution in the dedicated xml files without much result
* Disabling Render to transparent surfaces does not help at all
* Removing my affinity mask in the cfg did not help either
* Removing any Nvidia Inspector "smoothness tweaks" did not help
* Unlimiting fps in P3D settings makes the fluctuations even worse (maximum fps goes up to 45 at Orbx KSAN but still fluctuates down to 15/20)
* Decreasing P3D scenery settings by 1 then 2 notch down did not help (I would not consider this as a final solution anyways considering my PC specs)
* Reducing P3D lighting settings (shadows to low, dynamic reflection off) did not help
* Reducing P3D display settings (Max texture resolution, Antialiasing off, FXAA off, no anisotropic filtering etc...) gave the same results
* Disabling dynamic lighting did not help
* Disabling trueglass did not help
* Turning UTlive OFF didn't help
* I'm using Envshade but restoring default shaders did not help
* Disabling most of my 3rd party addons that could possibly conflict (exe and dlls) did not help
* Renaming the folders "_low" in the aircraft folder in order to use these instead of the standard ones did not help
* Installing the low res version provided on this forum instead of the orbx version gave the same results
* Running the KA350 exclusively from default airports: yes the fluctuations are less obvious with fps locked at 30 but it's still less smooth than any other aircraft and not being able to fly this beauty on 3rd party sceneries definitely is a no go for me
* Changing the pixel size value from 2048 to 1024 to each Vcockpit entry in the panel.cfg did not help
* Using the provided legacy gauges did not help
* Checking the VRAM usage : between 70% to 75% , 3rd party scenery or default airport does not seem to change much the VRAM usage.
* Fluctuations are more obvious when panning, especially when looking at the gauges in the cockpit
* Fluctuations are much less visible in external views but still there
* As soon as cockpit displays are off, fluctuations are much less obvious but still there
* My cpu cores do not seem to be saturated and looks to be used as usual by the sim, core 0 is not even totally full
* My GPU usage remains at 40/50% as usual
*EDIT: I have also attempted a quick flight to see if it would be okay during cruise over water, but even this did not help either
Here is a video showing the fluctuations and the very laggy panning and movements:
https://youtu.be/xMtTQ51En-s
Here is the exact same test with the PMDG 737 NGXu which was the most heavy aircraft with the FSL A32X on my PC until now:
https://youtu.be/0kFovFgSccM
These videos probably won't help you but you'll see that there is definitely something wrong here with my install of the 350i as the same test in the same conditions provide a butter smooth experience with one of the heaviest 3rd party aircraft nowadays.
After reducing pretty much every single P3D setting to find the culprit and getting my P3Dv4 looking like a FS2002 without getting any kind of positive result I'm pretty much out of ideas now,
Even trying on a default airport with all the tests performed above does not bring much more smoothness as I even been able to see some fps jump from 60 to 10 with unlimited fps ! Panning feels like a power point with so much fluctuations.
I'm pretty sure this comes from the Aircraft, may be this only happen in some specific configurations but I've never experienced such bad performances before. I'd be glad to test anything else so any suggestion would be much appreciated

Thanks by advance,
Maxime