Stumbled on this one: https://forums.flightsimulator.com/t/performance-boost-g-sync-off-frame-generation-msfs-2025/727473

I did not yet have time to test it myself, but some positive feedback over there. What I wonder is: the TS writes about aiming for FPS numbers that exceed the monitor refresh rate. Which is simply impossible in my case. He also doesnt make it clear if this is a prerequisite for the "no G-Sync trick" to work or not. He also doesnt specify if this trick only works for G-sync compatible monitors.

My setup as of now is to limit the FPS to 36 and then double them via nVIDIA frame generation to 72, which is exactly half of my monitors refresh rate (144Hz) and I get pretty smooth sim. BUT: for the sake of whatever, I have scenarios (MK Sim LSZH with IniBuilds A350 e.g.), where I do not reach those 36 baseline FPS and thus my FPS drop to 65-70 after frame generation and it stutters. So I will be very curious if turning off G-sync does any good in my case with my setup. I doubt...

Turning off GSync will get things worse in your case in terms of frame pacing. Disabling GSync will not increase your framerate.

The statement "seems to be broken for MSFS 2024, hammers main thread and causes stutters" is weird and not what I am experiencing from a quick test.

65-70 fps with GSync are always better than 65-70 fps without.

 

It IS weird, but as several users seems to confirm it, I wonder why? And as I cant join the discussion in the off. forums, I started the thread here to see if this is snake oil or not.

2 hours ago, AnkH said:

Stumbled on this one: https://forums.flightsimulator.com/t/performance-boost-g-sync-off-frame-generation-msfs-2025/727473

Now that is the most technically inept thing I have read in a while. And yet no doubt hundreds, if not thousands of people will 'try' it. And then complain when their sim starts becoming a stuttering mess. 

And frames exceeding the monitor? Yeah, let's all create frame pacing issues and tearing issues. 

If you have G-Sync, use it, there is nothing better. 

17 minutes ago, Ianrivaldosmith said:

If you have G-Sync, use it, there is nothing better. 

Unless it is broken, what the topic starter in the off. forums claims. Then using it would not make it better 😉

2 minutes ago, AnkH said:

Unless it is broken, what the topic starter in the off. forums claims. Then using it would not make it better 😉

But it isn't broken. 

In the thread you posted, read geloxo reply. He has the answer spot on. 

Edited June 26, 2025Jun 26 by Ianrivaldosmith

interestingly the latest nvidea drivers caused me great angst - all of a sudden my monitors ( samsung ark, LG 65" tv & an LG monitor(the only one with G-sync)) would flicker & basically just wouldn't work - rang my guru & he suggested that I turn off the G-sync on the smaller monitor(which I only use for little nav map & a few other periferals) - guess what - I don't have the flickering screens anymore & the whole lot has become stable again - maybe not really germain to this post but if you have multiple monitors - especially if only one of them has G-sync then it is best to turn it off

7 hours ago, Rattso said:

interestingly the latest nvidea drivers caused me great angst - all of a sudden my monitors ( samsung ark, LG 65" tv & an LG monitor(the only one with G-sync)) would flicker & basically just wouldn't work - rang my guru & he suggested that I turn off the G-sync on the smaller monitor(which I only use for little nav map & a few other periferals) - guess what - I don't have the flickering screens anymore & the whole lot has become stable again - maybe not really germain to this post but if you have multiple monitors - especially if only one of them has G-sync then it is best to turn it off

Change to a working driver then. Don’t disable G-Sync. I use 4 monitors. G-Sync functions fine. If a driver broke it, I would revert back to a working driver. I wouldn’t disable G-Sync. That’s just stupidity. 

i use g-sync on 2 screens and 1 screen that isnt g-sync. g-sync is not the problem, why people jump on nonsense advice like it came direct from a tech lab is beyond me. 

 

I finally managed to test it and as I do NOT have FPS always above my refresh rate (144Hz 4K monitor, even with FG impossible to reach 144FPS) I am still WAY better off using my locked 72FPS (with FG) approach and Gsync on. As others guessed, but at least I tested it now 🙈🤣

19 minutes ago, AnkH said:

I finally managed to test it and as I do NOT have FPS always above my refresh rate (144Hz 4K monitor, even with FG impossible to reach 144FPS) 

But even if that were the case, you could have 144 fps AND Gsync, so that when the framerate dropped to 143 and below, you would still have it synced with the refresh rate of your monitor.