3090 first Impressions

[Gunnars Driver]

so quick test against the launch mission, it makes no difference on settings, as soon as you look at the super structure (even with the head rest in the way) you spike the CPU at about 25.4ms , i suspect this is in part to do with the parked hornets, rather than the actually t superstructure itself, looking at the helo i get about 21.1 ms CPU time ...

 

Is this a f-18 or F-14 instant action?

What I used was a multiplayer mission that I use to host.

Maybe a difference in loads due to other aircrafts/AI ?

 

 

[Gunnars Driver]

@Gunnars Driver , I was trying to replicate your settings and performance. The only way i could do it was with a core clock of 5.2 and mirrors off.

 

I find the hornet cold start mission, far more taxing than the F-14 Carrier Quals, and looking at the tower on the SC has a significant frame rate impact (taking it back to 45 just in the hornet, and a stable 45 in the Tom) still playing as we all like our eye candy in different places :)

 

In my own mission, select a engine running F-18 on the supercarrier I get about 8ms CPU fram times. Looking at the tower increases the frame time to slightly above 11.1ms so FPS falls to 45 but rarely.

As the fram time is this low, I can tune down the CPU to 5.0 without any loss at this position.

 

I also did as supmua suggested, but I didnt tune down the settings tgo the very low VR-preset. Id never fly with those pretty low settings, not even when I hade a 1080.

So pressing F2 + zooming away so I can do the 360 around my F-18 i still had about 8ms CPU time, during the complete 360 turn I had one red spike on fpsvr on the CPU, so short that I didnt notice any lag or stutter. All other times except that was about 8ms and in the green band for 90fps.

 

I don know if theres any standard mission with the SC where we can use the same mission ?

When I fly with my friends I dont notice any stutter so the frame time dont go above 22ms. When I tune DCS settings I tune to have some 25% margin to 22.2ms (that was with 2080ti+reverb...havent tuned it now, and I dont think Ill tune for the Reverb with the 3090. Tuning will be for the 8KX, thats the absolute main reason I did get the 3090.)

 

 

[speed-of-heat]

i have been using the F-14 carrier qual and the F-18 cold start missions i find that looking straight at the "Tower" and holding causes a big red blur across the CPU frame rate for me

[Gunnars Driver]

So I found the mission acording to the picture below ( F-14 instant action bottom mission).

Suggest we find a common solution to check tings.

 

I use Open Beta, I dont know if theres any big differense to the official releasde version.

 

This is the fpsvr text report:

 

fpsVR Report:

App: DCS HMD: HP Reverb VR Headset VR1000-2xxx0 (90.020 Hz, IPD 65.5)

GPU: NVIDIA GeForce RTX 3090 (27.21.14.5730) CPU: Intel® Core i9-9900KS CPU @ 4.00GHz

Delivered fps: 55.67 Duration: 1.5min.

GPU Frametimes:

Median: 10.2 ms

99th percentile: 12.5 ms

99.9th percentile: >30 ms

frametime <11.1ms(vsync): 90.9%

CPU frametime:

Median: 9.7 ms

99th percentile: 11.6 ms

99.9th percentile: >30 ms

frametime <11.1ms(vsync): 97.9%

Max. SteamVR SS: 100%

Render resolution per eye: 2208x2160(by SteamVR settings, Max.) (HMD driver recommended: 2208x2162)

 

The 99.9 percentile does happen when I alt tab to start and stop the logging so If not doing this they isnt present.

Also, Alt+Enter to make the screen fullsize(lowers framtimes) also causes frame spikes so I didnt use full screen window.

 

A started the mission, activated fpsvr logging and then taxied to a catapult. Didnt look at the tower this time, but it only causes the frame times to increase slightly( 13ms maybe).

 

 

 

[Gunnars Driver]

Heres the same mission starring at the tower from the initial position in the F14:

 

Remember I'm at SS100% if you didnt notice this.

Might wanna read my the #16 post

https://forums.eagle.ru/forum/englis...86#post7145186

 

I didnt notice the dropped frames until posting the pic, I never see dropped frames otherwise. There was no spikes this time.

 

[speed-of-heat]

stripped out my mods ... got results very similar to yours ... now to find the culprit!

[Gunnars Driver]

stripped out my mods ... got results very similar to yours ... now to find the culprit!

 

Yes, I have no mods. Have never cleared the shaders either.

 

my friends tested a new mod that sorts out data outside a ”VR-cone”. They say it made a big positive change. Dont remember the name of this mod but I can get back. Cannot be used with pimax though as it has to wide FOV.

 

 

[speed-of-heat]

still pretty poor on the Hornet cold start on the super carrier though ... 22ms +looking at the super structure

[GunSlingerAUS]

Thanks for the reply. Glad you're enjoying your VR experience, and I look forward to the day when I can join you.

[Mr. Big.Biggs]

Which were the 3090 brands that didnt have the problems withI believe it was cheap capacitors? I am going to start looking for availability going forward but don’t want to buy a lemon.

thanks!!

[speed-of-heat]

Which were the 3090 brands that didnt have the problems withI believe it was cheap capacitors? I am going to start looking for availability going forward but don’t want to buy a lemon.

thanks!!

 

none of them went to manufacturing with the problem, as i understand it. a lot of early review models had the issue.

[speed-of-heat]

so after tuning and fiddling, i can get a regular 90fps, with occasional dips to 45, and the only place perf is poor is on a hornet crowded super carrier when you are looking straight at the island (it's due to the hornets or the number of them, without them its fine), i run without AA (I can i just dont like it) and by default without mirrors as they are still a cpu hog.

 

I'm not using the shader mod, it does provide a very small improvement (strangely to both CPU and GPU of between 0.8 and 0.9ms and i might start using it again, my in DCS settings are below, PD is 1.0 :

 

I also use this mod, to add shadows back in the cockpit and on the ground ( Shadows Reduced Frame Rate Impact.zip )

 

other observations, I frequently use more than 10Gb of VRAM, 12 in the caucuses, more in the Channel.

 

I'm very glad with my purchase.

Shadows Reduced Frame Rate Impact.zip

[Supmua]

This is what I observed from Hornet Mission Qualification SC Launch. Valve Index 100% SS, PD 1.0. 9900K 5GHz, Asus TUF OC 3090, 32GB 3600 CL14.

 

This is clearly the situation where CPU bottlenecking occurs. CPU FT went up to 30ms while GPU FT stays in the 15s. So the 3090 can’t pull my FPS up to a reasonable level. This same setting has zero issue with Hornet free flying PG instant action, stable 80 FPS even in downtown Dubai.

 

I need to do some further experiments to see what can help improve CPU FT from the standard VR preset in this situation.

 

[Supmua]

Now this is the exact same mission just cockpit view looking straight.

 

[speed-of-heat]

Yes. It sis the total number of close hornets that you are looking at (14 or so on the deck) try this, edit the mission and remove the hornets, or replace them with ai hornets (old lower poly count models) and it gets a lot better...

[GunSlingerAUS]

Which were the 3090 brands that didnt have the problems withI believe it was cheap capacitors? I am going to start looking for availability going forward but don’t want to buy a lemon.

thanks!!

 

That turned out to be a load of BS. Ignore it.

[Supmua]

Yes. It sis the total number of close hornets that you are looking at (14 or so on the deck) try this, edit the mission and remove the hornets, or replace them with ai hornets (old lower poly count models) and it gets a lot better...

 

Yeah, those Lot 20 Hornet objects seem to have huge impact on CPU frame time. That was just about the only mission I tested that showed my CPU frame time in the red zone, so it's not a good mission to benchmark since it will be too extreme even with high-end PC setups. Besides that mission I usually have no frame rate issue. I'm currently able to get a constant 80 FPS (yes, no reprojection finally) with the standard VR preset plus MSSA 2x as well as 150% supersampling when flying about even in congested areas, and it looks pretty darn good with minimal shimmering. However, on the ground with lot 20 Hornet objects, such as Ready on the ramp Dubai instant action, both CPU and GPU FT would be in the yellow zone until I taxi past them.

 

I'm still looking for some good default missions that would be accessible to everybody to do some benchmarking. The main objective is to try to show which settings affect what (GPU or CPU or both), and by how much. This is so we can have a better understanding of what to expect from certain types of VR setups, and how to optimally adjust the settings to get the kind of performance you want (i.e. optimal visual quality vs optimal frame rate vs something in-between without the game being a slide show). They have to be mild to moderately stressful to the system but not too severe like the Super carrier launch ones. The Hornet Waypoint nav training seems like a good one so far, it clearly shows a moderate reduction in GPU frame time with 150 vs 250% supersampling while CPU frame time remains largely unaffected.

[Gunnars Driver]

I'm still looking for some good default missions that would be accessible to everybody to do some benchmarking.

 

I guess people game too different to find a solution that fits all.

 

I have yet to find any missions that significantly put the CPU frametimes above the GPU's. Yes it got closer by changing the 2080ti to a 3090 but still...

This might be due to the fact that the missions I play with my friends doesnt have the stuff that increases CPU time to red values. And, I dont need to find one of these really.

 

We can use (for example) the mission in this thread for benchmarking: https://forums.eagle.ru/forum/english/dcs-world-topics/input-and-output/virtual-reality/289741-gryz-s-benchmark-results

but for tuning I guess one should use their own typical mission to make the tuning as adopted to their own gaming style as possible.