90 fps steady with 7900xtx - disabled simapp pro!

[TED]

Since getting my 7900xtx last week I've been testing and tuning. I started another thread and already described the significant upgrade I got over the 6900xt. However I felt it was still being held back somewhere as the gpu was not being well utilised. 

Today I did 2 things. 

1. Updated to latest amd adrenaline driver.

2. Updated simapp Pro then closed it and disabled it whilst playing dcs. 

I use a winwing setup for f18 with mfd and ufc. As I'm only in vr, I don't care about the display on the ufc as all the buttons still work. 

Immediately I was getting a constant 90fps on my g2. This is with openxr custom res to 110%. 

I didn't get much time to push it more but attached are images of settings. I was absolutely blown away by this performance. I can see it can still be pushed a bit more so later will try when I have time. The only time things dip a bit are on the runway looking to the airport side where it dropped to 85. Apart from that low level in the f18 is incredible now. Totally smooth and stutter free. 

Later i will max all the shadows and then see how it is. After play will increasingly resolution even more and/or msaa. 

Edited July 11, 2023 by TED

[speed-of-heat]

what is your headset ?

[Eaglewings]

what is your headset ?

I believe he is using HP reverb g2. I see g2 mentioned in the writeup.

[speed-of-heat]

ah you are correct, missed it, thanks

[TED]

Yep. Reverb g2 and cpu is 5800x3d.

[Eaglewings]

Yep. Reverb g2 and cpu is 5800x3d.

Nice to see this great feedback on AMD GPU.
Are you experiencing any visual anomalies with motion reprojection turned on? There are a lot of complain about AMD GPU in VR and that has made any gpu upgrade focus on the Nvidia cards only for me.

[TED]

5 minutes ago, Eaglewings said:

Nice to see this great feedback on AMD GPU.
Are you experiencing any visual anomalies with motion reprojection turned on? There are a lot of complain about AMD GPU in VR and that has made any gpu upgrade focus on the Nvidia cards only for me.

I am not using motion reprojection. At 90fps, absolutely do not need it. MR would only make the image worse. It is so smooth without it, there is absolutely nothing more to be gained using it.

[Eaglewings]

I am not using motion reprojection. At 90fps, absolutely do not need it. MR would only make the image worse. It is so smooth without it, there is absolutely nothing more to be gained using it.

Nice

[TED]

I just had a bit of time to test further. Added all shadows to high, msaa to ×2 and openxr developer tools custom res 110%. In openxr toolkit upscaling to 100%.

Results largely the same. Still 90fps and good gpu/cpu times. Slight dip to 80 during takeoff but still smooth. After that basically stays at 90 fps. 

It would seem to me that perhaps many of the issues are not so much amd or dcs but other firmware from hardware, in my case from simapp Pro. Possibly also the new drivers drivers helped. Either way this is absolutely amazing performance and is way beyond what I thought was possible in vr. Even on my g2 the image through thr headset is very close to that on the 2d screen. 

Below some images of settings and performance. 

Edited July 11, 2023 by TED

[speed-of-heat]

your resolution is showing as 2180x2180, the normal 100% for a G2 is 3100x3100 ish, thats driving about half the pixels of normal 

[TED]

7 minutes ago, speed-of-heat said:

your resolution is showing as 2180x2180, the normal 100% for a G2 is 3100x3100 ish, thats driving about half the pixels of normal 

If I'm not mistaken the g2 is 2160 x 2160 per eye. The openxr toolkit also shows per eye resolution. 

Add to this openxrdt is set to 110% so it should upscaling each eye by 10%.

Edited July 11, 2023 by TED

[speed-of-heat]

you are mistaken 

it has a physical resolution o 2160 by 2160, runs at 3196 x something similar to account for barrel distortion, as its native resolution 

[TED]

3 minutes ago, speed-of-heat said:

you are mistaken 

it has a physical resolution o 2160 by 2160, runs at 3196 x something similar to account for barrel distortion, as its native resolution 

This is new to me. Everything I've read claims 2160x2160 and every game I've played when everything's set to 100% it shows 2160x2160. 

I know steamvr at 100% used to show different numbers but never with wmr or openxr. 100% had always been showing 2160.

[nikoel]

So from I recall reading during my research, the Reverb G1 had 100% Resolution of ~2200px due to the lenses they had implemented

The Reverb G2 then moved to ~3000px resolution due to more aggressive lenses which required a stronger pincushion offset. The displays between the units were identical

Edited July 11, 2023 by nikoel

[some1]

Identical in resolution, different in terms of colors, brightness etc...  It's just that for whatever reason they decided there is some gain to run the headset at higher resolution, so the "100%" target has been moved higher. Heck, Oculus moves the 100% position depending on the refresh rate you select, so why not?

Both G1 and G2 headsets looked comparable at the same pixel resolution. You could run them higher of course, if your pc could handle that.

[TED]

19 hours ago, speed-of-heat said:

you are mistaken 

it has a physical resolution o 2160 by 2160, runs at 3196 x something similar to account for barrel distortion, as its native resolution 

So I tested this now too and bumped res up to 3100. A noticeable improvement on image with an expected hit on performance. I was able to manage around 75 fps at this res with 60 fps on the runway. This is with all maxed setting in dcs. Jitters occur when the fps hops up and down. So if I enable throttle fps in openxr toolkit to 60fps in this case (resolution at approx 3100x3100), it is all extremely smooth even very low down and over built-up areas. Really nice combination of fantastic image and smooth performance. 

So my findings here are that throttling fps in openxr is a great tool to smoothen any jitters. I'm undecided if I prefer stable 90fps at around 2500×2500 or full 3100x3100 at 60fps. Both look fantastic. All of this anyway puts the 7900xtx up into 4090 territory for vr at a fraction of the price. 

[nikoel]

3 hours ago, TED said:

So I tested this now too and bumped res up to 3100. A noticeable improvement on image with an expected hit on performance. I was able to manage around 75 fps at this res with 60 fps on the runway. This is with all maxed setting in dcs. Jitters occur when the fps hops up and down. So if I enable throttle fps in openxr toolkit to 60fps in this case (resolution at approx 3100x3100), it is all extremely smooth even very low down and over built-up areas. Really nice combination of fantastic image and smooth performance. 

So my findings here are that throttling fps in openxr is a great tool to smoothen any jitters. I'm undecided if I prefer stable 90fps at around 2500×2500 or full 3100x3100 at 60fps. Both look fantastic. All of this anyway puts the 7900xtx up into 4090 territory for vr at a fraction of the price. 

You going to embrace 60hz MDMA Lyf?

[TED]

14 minutes ago, nikoel said:

You going to embrace 60hz MDMA Lyf?

No. I tried that but the flickering was too much for me. 

I'm sticking with 3100x3100 and fps at 60. Its a smooth as can be. Even moving head around and looking to the sides. 

Edited July 12, 2023 by TED

[streakeagle]

The new driver made a huge difference in stability/functionality in VR with the Reverb G2 and a slight performance upgrade. Prior to the new driver I was seeing an average of 55-65 fps in typical missions with most aircraft on old terrains, less than 45 fps in an Mi-24 on Sinai at low altitudes. After the latest driver, I am averaging 65-75 fps with a solid 45 fps in the Mi-24 on Sinai. At altitude, or in a simple terrain like Nevada flying F-86 vs MiG-15, I see 90 fps. But the fps is unstable if I am near the ground and/or in a complex cockpit: the direction I am looking can drop it from 80-90 fps down to 45-55 fps. But I run at very high in-game display settings except for clutter being dropped to 750m. MSAA x2 drops the peak fps from 90 to about 70-80 fps and more like 45-65 fps under higher loads. 

For some reason, the 7900XTX seems to be real sensitive to ground clutter and sometimes the frame rate looks choppy when moving my head.
The 6900XT was far more stable in fps but with aggressive display quality settings was running 45-60 fps under good conditions and 30-45 fps under high loads like Mi-24 in Sinai.

On the other hand, the 7900XTX was locked at 60 fps in 2D and all of the quality settings maxed out except MSAA only at x2 (my monitor is a 50" 4K TV with a 60 Hz refresh). The in-game frame rate graph estimated frame rates of 120-140 fps if I didn't have VSync locking it down to 60 fps. I can't wait for the day when the VR looks as good as 2D with comparable resolution, maxed out display quality settings, and still run at 90+ fps. But for now, the choices are: Run 2D at 4K and max display quality using TrackIR, run VR at 90 fps peak with reduced display quality, run VR at 45-75 fps with almost max display quality.