Flickering PMDG glass cockpits w/ panning w/ Nv FG?

[RJC68 823]

2 minutes ago, Cpt_Piett said:

It’s a game-changer! A real gem 💎 Forgot to load it before a test flight yesterday and couldn’t fathom why I suddenly had hard stutters when panning. I was probably at TLOD 400 or something, at Heathrow.

Just did a little experiment since locked FPS has given me so much GPU-headroom. Decided to test DLDSR at 2.25x the native resolution of 3840x2160. That’s 19,9 megapixels vs 8,3, pretty crazy. And lo and behold, the 4090 managed to pull it off. Just. It was running at a constant 100%. 

I turned it down to 1.78x native which still gives amazing cockpit clarity, but at a lesser cost. It’s one of the few times since getting the 4090 I’ve seen mainthread and GPU frame times almost perfectly in sync. 

Sorry I forgot to ask are you using DLSS or TAA when you were running the CapFrameX tests? I am still running TAA.

[Noel 4,563]

3 minutes ago, Cpt_Piett said:

Decided to test DLDSR at 2.25x the native resolution of 3840x2160. That’s 19,9 megapixels vs 8,3, pretty crazy. And lo and behold, the 4090 managed to pull it off. Just. It was running at a constant 100%. 

That is bizarre.  I've been running DSR 4x (6880x2880) since Dec '22 and my GPU has been coasting and is even more so now with 4090.

[Cpt_Piett 4,817]

33 minutes ago, Noel said:

I'm confused, you said you used edge sync for that, but then said Nv Reflex.  Can't be both from the dropdown?

I’ve been going back and forth the last few days with RTSS settings, no wonder you’re confused. I’m barely keeping sane myself with all these experiments 😉

I’ll try to explain: RTSS frame rate limiter with the NVidia reflex option: mainthread frametime increased significantly. Back to edge syncs and mainthread dropped from around 23 to 18 IIRC. 

Edited February 21 by Cpt_Piett

[Cpt_Piett 4,817]

17 minutes ago, RJC68 said:

Maybe my RTSS was outdated, I ran CapFrameX and got results like yours, literally zero FTV but in the sim I was getting micro stuttering that did not seem to show in the CapFrameX software. I just put it down to limiting FPS externally with FG.

I have some time over the next 2 days to test. I will install the latest version of RTSS and see how it goes

That’s interesting! I’ve become so caught up in FTV that it’s easy to forget that there could be other sources of visible perceptible microstutters. I’ll look into it!

And to confirm your question further back in the thread: yes I’m using G-sync, V-sync and ultra low latency. 

Edited February 21 by Cpt_Piett

[RJC68 823]

1 minute ago, Cpt_Piett said:

Ive been going back and forth the last few days with RTSS settings, no wonder you’re confused. I’m bare keeping sane myself with all these experiments 😉

I’ll try to explain: RTSS frame rate limiter with the NVidia reflex option: mainthread frametime increased significantly. Back to edge syncs and mainthread dropped from around 23 to 18 IIRC. 

Maybe I will just be lazy and wait for you guys to figure the best settings 🤣

I am a little confused with all this as well, Are you still running VSYNC forced on in NVCP as well as locking fps in RTSS while using edge sync? 

[Noel 4,563]

I just installed the latest and see reflex there now.  As I see it, can't get any better than literally zero stutters from gate to gate and that includes in and out of EHAM and EDDF in FBW320n but out of curiosity have to try reflex....right now just getting ready....

[Cpt_Piett 4,817]

6 minutes ago, Noel said:

That is bizarre.  I've been running DSR 4x (6880x2880) since Dec '22 and my GPU has been coasting and is even more so now with 4090.

How is it bizarre? And what do you mean by coasting (sorry, English is not my native language). 

[Cpt_Piett 4,817]

1 minute ago, RJC68 said:

I am a little confused with all this as well, Are you still running VSYNC forced on in NVCP as well as locking fps in RTSS while using edge sync? 

Yes.

[Cpt_Piett 4,817]

10 minutes ago, RJC68 said:

Sorry I forgot to ask are you using DLSS or TAA when you were running the CapFrameX tests? I am still running TAA.

DLSS at ultra quality. 

[Ixoye 1,837]

1 hour ago, RJC68 said:

So you are not running any VSYNC, NVCP or in the Sim?, Are you running with FG?, Also are you using RTSS to cap the FPS? and lastly what refresh rate are you running?

This might be worth investigating further 

No VSYNC in NVCP or in the Sim, I use RTSS capping to 60 with front edge sync using FG, but today it wasn't as smooth when panning as yesterday evening even though my fps stayed a constant 60 fps throughout the flight, I wonder if it might have something to do with the download speed from the MS server, it hasn't been at its best lately.

Btw, the image quality arn't nothing to write home about in DX12, the sun looks like an unrealistic light point that you can see straight into and it flashes trough the fog, that plus all the other glitches I've seen so far have made me want to go back to DX11, so I will try the same settings with RTSS in DX 11 and see how that works out.

[RJC68 823]

I am performing a full image of my PC before I start tinkering 🤣🤣

[Noel 4,563]

18 minutes ago, Cpt_Piett said:

How is it bizarre? And what do you mean by coasting (sorry, English is not my native language). 

Coasting--not working hard at all!

Bizarre because I've been running DSR at 6880x2880 on a 3080Ti for a year and the 3080Ti was coasting, and you said your 4090 was at 100%.

[Noel 4,563]

After installing the latest RTSS, rebooting, chose Nv Reflex:  micro-stuttering mess!

I proved all of this a year ago--it's all about EDGE SYNC.  That was true with 3080Ti, and fortunately the same with 4090 w/ FG.  I use TAA as well. 

[Cpt_Piett 4,817]

18 minutes ago, Noel said:

Coasting--not working hard at all!

Bizarre because I've been running DSR at 6880x2880 on a 3080Ti for a year and the 3080Ti was coasting, and you said your 4090 was at 100%.

That’s weird. Even weirder as I’ve read reports re: (non-DL) DSR that it can be very taxing on the GPU. Can’t understand how you managed to pull off 6880x2880 on a 3080Ti. 

8 minutes ago, Noel said:

After installing the latest RTSS, rebooting, chose Nv Reflex:  micro-stuttering mess!

I proved all of this a year ago--it's all about EDGE SYNC.  That was true with 3080Ti, and fortunately the same with 4090 w/ FG.  I use TAA as well. 

Well, we have similar observations on this then. I’ll be using edge sync from now on. Btw, does it matter which one?

Edited February 21 by Cpt_Piett

[Noel 4,563]

 

The frame rate was 60, but lost focus so says 35.9 in this image: