2.8 update has 20 % fps loss on pimax8kx and 15 fps loss on Varjo Aero (RTX 4090)

[nachomaga]

1 hour ago, zildac said:

1 hour ago, nachomaga said:

Not yet, I will do in two hours or so. I’ll post the results.

Great, thanks

Just tried without SteamVR, same fps loss with my previus (2.7) settings. I espect more fps loss. This is weird, perhaps OpenComposite is not doing it's magic?

[zildac]

12 minutes ago, nachomaga said:

Just tried without SteamVR, same fps loss with my previus (2.7) settings. I espect more fps loss. This is weird, perhaps OpenComposite is not doing it's magic?

Sorry are you saying that the FPS loss is the same whether you are using SVR or OC?

[nachomaga]

3 minutes ago, zildac said:

Sorry are you saying that the FPS loss is the same whether you are using SVR or OC?

Yeah, I think so. Anyway I’m doing more testing now, and I see a difference between SVR and OC (some frames better in OC, of course). But not huge as in 2.7, it seems.

Next thing is to update Nvidia drivers. I know, I had to do it in the first place, hejeje.

[nachomaga]

Same fps loss with last Nvidia drivers.

[Talisman_VR]

20 hours ago, darkman222 said:

The thing is, it does not even look different or better. Why do we have that fps drop.

To me it actually looks worse as well as unplayable fps!  

Edited October 29, 2022 by Talisman_VR

[Moxica]

31 minutes ago, Talisman_VR said:

To me it actually looks worse as well as unplayable fps!  

 

To me as well. Some setting is set to auto, it seem. Probably in oculus debug tool, reducing quality to that ole mush. This is so frustrating.

Edited October 29, 2022 by Moxica

[obious]

Just to follow up on this. In the NTTR F-14 BFM mission I uploaded earlier (try it out if people are starting to doubt) with 2.8, I was getting ~8.5ms GPU frame time. After reverting back to the latest 2.7 OB, I'm now getting ~6.5ms. Something has gone seriously wrong with the 2.8 release. 

Just an FYI, I'm running 90fps and haven't changed any graphic settings between updates.

[Burt]

Things have to bake ! Give it time.

[Moxica]

3 minutes ago, Burt said:

Things have to bake ! Give it time.

Yeah! Let it rest for a while. Maybe if we leave it alone an hour or so, the problems will go away.

[Burt]

[Supmua]

I'm taking apart my PC, upgrading mobo and CPU from i9900K to Ryzen 5800x3D.  If all goes well will grab some more frame numbers.  But I think overall this update is somewhat busted (at least in the shadows setting) and shouldn't be relied on for true performance.

EDIT: It's up and running and learned quite a bit from cross system upgrade--but unfortunately my RAM isn't compatible.  My 4 yo old RAM sticks however work but I'm gonna have to put some money on new high speed RAM to avoid gimping the system, so won't be benching until the new RAM sticks come in.  Also had a chance to reexamine the 16-pin GPU cable, no signs of melting, burn or crack...phew.

Edited October 29, 2022 by Supmua

[DerekSpeare]

Reverb G1 somewhat degraded.  Pc specs in sig.

[edmuss]

Clarity improved for me, the new ka50 cockpit looks lovely

Performance has dropped, I can run high settings and still pull >60fps to keep above refresh rate if I turn off terrain shadows and MSAA.

Oddly enough turning anisotropic filtering from 16 to off gave me close to 3ms uplift, I've never seen a performance hit before with AF. Perhaps it's interacting badly with the new clouds and textures?

[Panny]

I don't have objective numbers, but feel similarly. So frustrating to drop money for a 4090 and have performance somewhat nullified

[Supmua]

Just upgraded to 5800X3D from 9900K, on average my CPU frametimes drop by 3ms, and this is with somewhat crappy RAM with the Ryzen (3000MHz CL16 vs 3600MHz CL15 in the 9900K).  I can probably get better results with better RAM.  This pretty much cancels out whatever I lost from the 2.8 beta update (~2ms frametime) plus a bit more.

EDIT: really like the DOCP function in ASUS Bios, making overclocking my old RAM a breeze.

Edited October 29, 2022 by Supmua

[Tomcat388th]

I must be the odd man out I'm running a low end system and for me frame rate has stayed about the same this is with a g2 with open xr plus the tool kit. For me the cockpit looks sharper F18 to my old eyes.  MP on the hoggit servers and the squad I fly with on the ground low 30's depend on how much stuff is going on once in the air upper30's mid 40's. Doesn't seem like much but it smooth.  I was scared that this update would tank my rig. I'm running the nis scaler in the tool kit and 1.2pix in dcs

[Supmua]

You can still get good framerate with the Varjo Aero.

PC: Ryzen 5800x3D, RTX 4090.

Aero: Very High setting, SteamVR 74%SS, final res 3104x2660 pixels per screen.

DCS settings: VR preset plus High textures, High visibility, Low shadow, MSSAx2, Ans filtering X4

Mission:  F/A-18C PG free flight.

Add around 1-1.5ms to both captured CPU and GPU frametimes at that instant as the numbers dropped when I switched to fpsVR window for snapshot, so the actual numbers are slightly higher.  But you can see that 90 fps is possible in those light flying still.  I flew for 18 min, and the avg fps as you can see below (and 9 dropped frames in 18 min is pretty good).  At this fps there is zero cockpit tearing/stuttering which is very nice as the Aero still lacks motion smoothing.  Pardon my 16GB RAM, lol, these are my old sticks as my good ones are not compatible with the Ryzen.

More observation:

F-16 is a little less forgiving so I didn't quite get 90 fps in PG free flight, but mid 80s still.  Flying low in Dubai dropped the fps into 70s, however CPU frametime stayed green (<11ms) all the way.  So apparently Ryzen 5800X3D is a very strong CPU for flightsim, and in these free flight missions at above settings my 4090 is actually the bottleneck.  And this is even with not-so-great RAM, although I did overclock it to 3000Mhz CL15.  I left my GPU at stock settings due to recent fiasco with the melted connector, can probably get better GPU frametime with overlocking the GPU.

 

Edited October 30, 2022 by Supmua

[Gribbstar]

Just throwing this out there as it seems the VR Perfkit mod was the source of my 2.8 issues. As soon as I deleted the files from my DCS directory, I'm running super smoothly again.

I appreciate that there are so many variables in the mess that is getting VR to run well that I could have inadvertently changed something else too... Either way, if you have the VR Perfkit files in place, see how it runs without.

[5ephir0th]

Guys, those of you using OpenXR can you do some test with OpenXR toolkit enable and disable?

it’s late and im going to bed but lasts test I was doing I found that, with OpenXR Toolkit enable i get like 20% worse performance than without it, this on an Oculus Quest 2.

Maybe some change on 2.8 is in conflict with OpenXR Toolkit, tomorrow I will do more test

Edited October 30, 2022 by 5ephir0th

[Mars Exulte]

Well, looks like I'm missing all the fun, sitting over here unupdated. I figured there was a 60% chance a major version update would bring some sort of insanity.

[Pasquale1986]

There is defentily some change in Vram and ram usage. The new weather system is affecting this heavily. After turning terrain resolution to low and disabling the clouds the microstuttering is completely gone as are the FPS spikes. That doesn't make it better, but maybe this helps to point in the direction of the causing changes so ED @BIGNEWY can reevaluate.

I definitely get a better performance than before on the ground and/or at night with illuminated cities. So there is improvement on one end.

[Nuggetz]

PC Specs below.  8KX resolution 3840, normal fov and refresh rate 75hz. 
 

As many have experienced huge fps drop. For example in my case 50/51 fps sat on the ramp in a F16 at Gudauta in MS server under 2.7 version dropped to 40 fps. 
(albeit under 2.7 the resolution was 4128 per eye, and fps in general varies between 50-75).

Good news: like many I have been experimenting with settings various and 3rd party software to claw the fps back with varying results. This morning I uninstalled the Open XR Toolkit and VR Performance Toolkit and retested at the above server location fps went back to 47. I then adjusted visible range from ultra to high and reduced the anisotropic filter from x16 to x4 and now have 50 fps at that location.  There remains a loss of performance; however, the gap has narrowed at least restoring playable performance. 

While it is true that I could get more fps with VR Performance Tool Kit activated I did notice the occasional game freeze in the PG map for 1-2 seconds. This freeze no longer happens now the files have been deleted. Additionally the image quality is better without VR Performance Toolkit installed. 
 

While this approach appears to work for me you may have a different experience but I offer it in the hope it helps at least some of you. 
 

Still not happy about increased cloud shimmer especially in the PG map, but one step at a time. 

Edited October 30, 2022 by Nuggetz

[Jenson]

in 2.7 i have 60fps in sky but now with 2.8 i only have 45fps, i'm so sad with 2.8. 

[edmuss]

I've gotten back to up to a pretty realiable 13ms frametime which is keeping me above the 60hz refresh rate.

G2 running @60Hz, openxr toolkit set to 2600 wide resolution, FFR quality/wide, MSAAx2, high textures, high shadows, medium visibility. I think clouds are either low or standard but I'm rarely up in them so not an issue for me. No reprojection.

Terrain shadows off and low water (from high but I'm still unsure if this is a a major part of the losses) have been the sacrifices to keep the rest of it medium/high.

I can just about hold 60 FPS over Beirut with occasional dips down to high 50s which is ok, anywhere else is pretty solid 60fps and perfectly smooth.

[YoYo]

The same. Just changed my CPU to the i9 13900K over the last few days (builded new PC), installed DCS 2.8 yesterday and have less FPS than before (20-50meters over ground Motion reprojection has a problem to keep stable 45 FPS like before)! I was looking all day Today what is going on, and here is such a problem simply - update 2.8 looks like. 

Edited October 30, 2022 by YoYo