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Huge FPS drop after engine start

Featured Replies

  • Moderator
21 minutes ago, Wilhelm Prytz said:

No, it seems as it’s only happening with add on aircrafts.

Make sure Dynamic 3D Autogen Vegatation is OFF.

Ray (Cheshire, England).

System: P3D v5.3HF2, Intel i9-13900K, MSI 4090 GAMING X TRIO 24G, Crucial T700 4Tb M.2 SSD, Asus ROG Maximus Z790 Hero, 32Gb Corsair Vengeance DDR5 6000Mhz RAM, Win 11 Pro 64-bit, BenQ PD3200U 32” UHD monitor, Fulcrum One yoke, Fulcrum Throttle Quadrant.

Cheadle Hulme Weather website.

chlive.php

FPS drops when starting engines ? And comes back when engines are OFF ?

*Usually* this is due to the engine(s) having a kind of smoke or fake heatblur effect that kills your performance when the video card AntiAliasing is set to use "Transparency AntiAliasing" (which can bring FPS down to single digits even with a single 2D cloud on the screen 🙂 ).

How's your video settings ? Can you check if your transparency AA is on and if the plane you use has a smoke effect or something like that ?

  • Author
1 hour ago, Daube said:

FPS drops when starting engines ? And comes back when engines are OFF ?

*Usually* this is due to the engine(s) having a kind of smoke or fake heatblur effect that kills your performance when the video card AntiAliasing is set to use "Transparency AntiAliasing" (which can bring FPS down to single digits even with a single 2D cloud on the screen 🙂 ).

How's your video settings ? Can you check if your transparency AA is on and if the plane you use has a smoke effect or something like that ?

No it doesnt use any smoke effects. Sorry if it's a dumb question, but what is transparency AA? Can't find a setting named like that. I've:

FXAA: Off

AA: 2x MSAA

TF: Anisotropic 2x

TR: Medium - 1024x1024. 

Vsync:ON

Triple Buffering: On

Graphic settings are all medium/normal

 

I was referring to the settings in the NVidia Control Panel, in case you have an NVidia video card, of course.

EDIT: you have a NVidia GTX 1070. So maybe you might want to take a look into the NVidia Control Panel to inspect your settings there.

Another, maybe simpler thing to test, is to disable completely the AA in your sim, just for testing. Does the issue happen as well when AA is completely OFF ? If so, then it's not related to graphic settings.

Edited by Daube

  • Author

Problem solved!!

When I set the fps limiter slider within P3d to unlimited, it was 144 before, the problem dissapeared. Thanks for your help, and for the fast replies!

2 hours ago, Wilhelm Prytz said:

Problem solved!!

When I set the fps limiter slider within P3d to unlimited, it was 144 before, the problem dissapeared. Thanks for your help, and for the fast replies!

From the help and advice I was given to a different FPS problem, if frame rates need to be controlled it works much better to have P3D's setting for that as "Unlimited" and use the graphics card's controller to set frame rate restrictions. Which you've already discovered! 😋

FWIW: I also see a significantly higher CPU usage with Aerosoft Buses and PMDG Boeing as soon as their engines are running.

Best regards, Dimitrios

9950X3D - 64 GB - RX 7900 XTX - TrackIR - Power-LC M39 WQHD - Honeycomb Alpha yoke, Saitek pedals & throttles in a crummy home-cockpit - MSFS for props, P3D for jets

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