Ok, I just MIGHT have a handle on what's causing stuttering for me

[Aluminum Donkey]

Greetings everyone,

I recently tried disabling Vsync in the sim and enabled Fast Sync in NVCP. It seems to have largely eliminated my stuttering problem.

Using normal Vsync either in-sim or in NVCP doesn't seem to work so well. I have to limit the framerate in-sim using the Max FPS slider (I set it to 75 FPS, which is my monitor's max) and then I use Fast Sync in NVCP.

Problem mostly solved! Only thing is, I still get FPS drops when flying under the Eiffel Tower in Normandy 2.0. I had the sim going for a while without it, I could just fly under the tower and it ran a solid 75 FPS. Now it drops down to maybe 62 or so. I wish it wouldn't do that...

Anyway, at least I have a handle on it. I wonder if the problem is with my monitor. I have an Nvidia graphics card and a Freesync monitor, but my monitor is about 8 years old and is not G-Sync Compatible--just normal "cheap" Freesync and not Freesync Premium or Premium Pro (my monitor is an HP Omen 32".)

That might have something to do with it. I'll keep messing around with settings and see what happens. Mostly, turning off VSync seems to have helped a lot. I just use Fast Sync now because with no sync at all, I get screen tearing even when running the sim at exactly the same framerate as my monitor's refresh rate (75 Hz.)

If you're having problems with this, try it yourself--it very well might be a monitor sync issue.

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[scommander2]

Yup, "Freesync" may be or may not be compatible with Nvidia GPU. But, can NVCP detect the monitor G-Sync available?

Edited July 14 by scommander2

[SharpeXB]

I always found Fast Sync in NCP to work really well for DCS back when I had a fixed rate display. 

[Aluminum Donkey]

14 hours ago, scommander2 said:

Yup, "Freesync" may be or may not be compatible with Nvidia GPU. But, can NVCP detect the monitor G-Sync available?

Yes, I can run G-Sync Compatible mode with my Omen 32" monitor. I'm now using Fast Sync instead of Vsync though, and set the framerate in the Settings menu with the slider. It just about eliminates stuttering for me.

Fast Sync is needed to eliminate screen tearing, it works well.

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8 hours ago, SharpeXB said:

I always found Fast Sync in NCP to work really well for DCS back when I had a fixed rate display. 

I'm finding that too, except I use variable refresh (Freesync enabled in monitor, G-Sync ON in NVCP.)

Using normal Vsync causes stuttering for me.

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[SharpeXB]

6 hours ago, Aluminum Donkey said:

I'm finding that too, except I use variable refresh (Freesync enabled in monitor, G-Sync ON in NVCP.)

Using normal Vsync causes stuttering for me.

Vsync is best turned off in any form when using G-Sync. If you see tearing just cap your refresh rate at or 2-3 frames below your screen. I think it’s better to use NCP for that since I see the DCS limiter may cause problems and you can’t fine tune it. 

[Aluminum Donkey]

4 hours ago, SharpeXB said:

Vsync is best turned off in any form when using G-Sync. If you see tearing just cap your refresh rate at or 2-3 frames below your screen. I think it’s better to use NCP for that since I see the DCS limiter may cause problems and you can’t fine tune it. 

If I enable G-Sync compatible with no vertical sync, I get tearing. I have to use some kind of vertical sync. Fast Sync seems to work best for me, Vsync causes stuttering and BS but Fast Sync works well if I set the framerate in the Settings menu with the slider.

[SharpeXB]

37 minutes ago, Aluminum Donkey said:

If I enable G-Sync compatible with no vertical sync, I get tearing.

Right. So just cap your frame rate at or 2-3 frames below your screen rate. That prevents tearing without the latency added by Vsync. Fast may be doing almost the same thing though. I think the limit is better in NCP than DCS. For myself I leave DCS at 300 (ie off) and set 117 in NCP for my 120Hz display. 

Edited July 15 by SharpeXB

[Aluminum Donkey]

On 7/15/2025 at 11:30 AM, SharpeXB said:

Right. So just cap your frame rate at or 2-3 frames below your screen rate. That prevents tearing without the latency added by Vsync. Fast may be doing almost the same thing though. I think the limit is better in NCP than DCS. For myself I leave DCS at 300 (ie off) and set 117 in NCP for my 120Hz display. 

Ok, in my case I always have to have some kind of vertical sync enabled or I always get screen tearing even if I set my game FPS to the monitor's refresh rate (75 Hz for me.)

Normal Vsync seems to cause a lot of stuttering in DCS. It could be the sim itself, or it could be a problem with the Nvidia driver causing monitor sync issues. I don't know. I just recently figured out though that if I use Fast Sync instead of Vsync and limit the FPS in-game to the monitor's max refresh (75 FPS) then I get much smoother motion without stutter and Fast Sync eliminates screen tearing, which I will always get without any kind of vertical sync enabled.

Maybe I'll try limiting FPS in the NVCP instead of in DCS itself just to see what happens, but it already works well with the framerate set in DCS.

AD

Edited July 17 by Aluminum Donkey

[silverdevil]

On 7/16/2025 at 8:33 PM, Aluminum Donkey said:

Maybe I'll try limiting FPS in the NVCP instead of in DCS itself just to see what happens, but it already works well with the framerate set in DCS.

there are other posts that echo this. you could also try OFF for the DCS settings and see if it helps. i have mine off.  i also use GSYNC. i have no stutters.

[Aluminum Donkey]

On 7/21/2025 at 4:14 PM, silverdevil said:

there are other posts that echo this. you could also try OFF for the DCS settings and see if it helps. i have mine off.  i also use GSYNC. i have no stutters.

Yeah, my stuttering seems to have mostly gone away. Maybe it was a monitor sync problem, I have an old monitor that is not listed as G-Sync Compatible (but it works) and is 8 years old.

It's working well now, also I seem to have better luck overall with ReBAR turned off in BIOS.

I still can't get my low-altitude FPS up as high as I used to with a fresh graphics driver install, though. No idea why. First time I run the sim it's awesome, next time I have problems with low FPS sometimes, but it's only when flying low near the Eiffel Tower in Normandy 2.0.

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[scommander2]

There was (is) a thread about the stutter in the low-level fly by a big forest, and it has nothing to do with G-Sync...

For example, the trees are no longer the static objects, and the wind blows trees and leaves move... it is required the heavy rendering (I think).