Every setting I can find, including graphics, is set to a refresh rate of 120Hz.  

I am pretty sure it works because if I change display settings to 60 Hz the max FPS I ever see is 20 and changing to 24 gives a max FPS of 6.

It is obvious, at least to me, that SOMEWHERE/SOMETHING in my system is limiting the screen update to 33% of the refresh rate.  The problem ONLY occurs in FS 2020 - no other app or game is limited.

But, during the last two months of investigation, I cannot find what is limiting the actual screen update rate.

Edited February 4, 20242 yr by TacomaSailor

This is really a weird case.
Do you just have a single monitor?
I think I remember reading about a situation where the refreshrate was divided accross multiple monitors. Probably a long shot but you've investigated all obvious ones.

 

And I would start using MSI Afterburner for FPS numbers. Besides that, what CPU does the TS have? 60% GPU load on low settings might also simply indicate a huge CPU limit...

FPS will now exceed 70 but no idea why.

I moved the sim to run on monitor 2 - a Samsung 32" 1920x1080x60Hz device.

Once there I was able to get >70FPS (Dev Mode measure agreed with RTSS and nVida) in Low settings and >50 FPS in high/ultra with levels of detail at 200.  Setting Vsynch ON in the sim resulted in FPS at 60 Hz

I then MOVED (no sim restart) to the AORUS monitor and saw FPS >60 in Low settings and 45 - 50 in High settings.

Shut down the sim and rebooted Win 11 - Still see >45 FPS in the sim.

Nothing seems to have changed except the frame rate now exceeds 40.

Just want to add that I had the same issue after my holidays now.

I came back after a week nd updated a lot of stuff: addons, Dynamic LOD, NVIDIA driver.

And wasn't able to get over 40 frames suddenly (steady 60 before)

 

culprit was probably with new NVIDIA driver: I had to re-enable (reinstall) the FSR mod and everything was ok then!

Hope this help others 

I know you checked NCP, but did you check V-Sync specifically under the Microsoft Flight Simulator tab in NCP?

I had same problem upgrading to latest Nvidea driver.  Frame rate dropped by half.😮

Dave Hinson

The problem went away - SEVERAL TIMES! -

I moved, for the second time, the sim to my 32" monitor and disconnected the 48" 4K monitor which is display port from the RTX 3060Ti.  The 32" monitor is HDMI from the motherboard integrated graphics Intel  UHD 630 at 60Hz.  The 32" monitor also showed a locked 40 FPS.

I then quit the sim to desktop and rebooted the PC with only one (32" 1920x1080) monitor but connected to the HDMI output from the RTX 3060Ti.  

I then started the sim and changed the in game resolution to 1920x1080.  I then saw 60+ FPS running the sim at mostly high settings with DLSS/Quality.  I increased the options to Ultra and 300/200 Terrain and Object LOD and still saw >45 FPS.

I quit to desktop and shutdown the PC.  I reconnected the Display Port to the 48" monitor and moved the 32" monitor cable back to the integrated graphics HDMI output. 

I then ran the sim using the 48" monitor at  3840/2160 120Hz and saw >50 FPS at high settings.   

I made no other software or hardware changes,  I flew for several hours while stopping and starting the sim.  I continued to see >50 FPS.

Next day I started the sim, just as I left it when it was running >50 FPS, but AGAIN the FPS was locked at 40.

I repeated the steps described above (moving the sim to the other PC...) and once back in the normal configuration - I again saw > 50 FPS.  That was five days, eight PC restarts, and about 15 sim restarts ago and I am still seeing >50 FPS when the options are set at high,

I have no idea why any of this worked the way it did.  

So what is wrong with 40fps ??

13 minutes ago, Beagle12 said:

So what is wrong with 40fps ??

That's not the point. 🥴 

10 hours ago, TacomaSailor said:

I have no idea why any of this worked the way it did.  

Do you use FSR3 Mod?

If so, have you de-registered the registry entry and registered again? Or better, don't even use it any more?

That was the solution for my problem

19 hours ago, Beagle12 said:

So what is wrong with 40fps ??

What's wrong with your sportscar limiting speed to 40 km/h down the Autobahn? 

It's way too slow. 

21 hours ago, Beagle12 said:

So what is wrong with 40fps ??

My issue here is really not about FPS. But rather the interesting technical problems I encounter in the MSFS world. 

I spent my entire professional life, starting with NASA in 1969, resolving technical problems at the hardware/software/user interfaces.  I do enjoy that kind of work. Flight Sim 2020, and all versions prior, have given me thousands of hours of enjoyment solving interesting computer problems.

I fly the sim as much to exercise my fading computer technical skills as I do improving my simulator pilot skills.

1 hour ago, TacomaSailor said:

I fly the sim as much to exercise my fading computer technical skills as I do improving my simulator pilot skills.

It seems to be the way these days Sailor, whether we want to or not!  

Edited February 12, 20242 yr by bobcat999

3 hours ago, bobcat999 said:

It seems to be the way these days Sailor, whether we want to or not!  

I know!  I look back on my circa 2006 posts in a place like the Hardware forum and man, I was either a little snoot, or had some knowledge back then.

These days I'm just happy if the new-build case CLOSES because of my bad/impatient cable-job.