Very Poor rift performance

[RabbitFoehammer]

Hi,

I'm having trouble getting BoS playable with my Rift. I've done some research and have put all the settings to minimum, but whenever I load into a plane, the image stutters and flickers constantly. If I stare straight or look down inside the aircraft it's fine, but looking around out the windows makes it pretty much unplayable.

 

Meanwhile War Thunder runs beautifully on Rift with very decent FPS at medium or even high settings. is IL-2 just poorly optimised for VR?

 

I don't need great graphics or fantastic fps, I just want it to stop stuttering so it's playable.

It's fine in the menu btw. 

 

Thanks,

 

Specs:

RX470

Intel Core i7-4770K

Windows 10 64-bit

16GB RAM

Edited January 16, 2018 by RabbitFoehammer

[Majick]

Hi RabbitFoehammer,

 

It sounds to me like you are being affected by the Oculus asw (asynchronous spacewarp, they call it...).  This is a method Oculus uses to smooth graphics by adding frames, and it confilcts badly with the prop effect in IL2. 

 

You can turn it off by using CTL and 1 on the numeric keypad.  Better still, download the Oculus tray tool and set up a profile for IL2 with asw turned off. This won't necessarily remove the effect entirely but should make the game playable. 

 

If it works for you,  you will probably find you can experiment with upping your settings again.

 

Good luck

[RabbitFoehammer]

Thanks for the suggestion

 

I set up a profile on TrayTool and it has certainly improved things. I can fly comfortably enough, tho it does still stutter regularly. The FPS counter hovers around 25 in-flight and 45 in the menu.

Do you know any other tricks that might further improve things? It just seems strange that I'm getting such low FPS while in other similarly demanding games it is much higher. Perhaps there's a particular small setting that would improve things?

 

Cheers

 

Edit: I realise my specs aren't quite up to scratch but so far they've done the job

Edited January 16, 2018 by RabbitFoehammer

[HunDread]

Disable HUD. Default key is H. It is an FPS killer.

 

Lower graphics preset to Balanced or Low and make sure you also lower shadow details. Lower or turn off AA.

 

Are you using any Supersampling in SteamVR or Oculus Tray Tool?

Also note that CPU and RAM speed have quite noticeable effect on BOS VR. A safe OC on both will give you considerable gain in case you are not already OC-ing.

[RabbitFoehammer]

I've had HUD off and had all those same settings. I'm not using supersampling and I haven't Overclocked. 

 

Looking at task manager it does appear that VR is eating a very large portion of my CPU, I might have a look into safe overclocking

 

Thanks

[haltux]

I set up a profile on TrayTool and it has certainly improved things. I can fly comfortably enough, tho it does still stutter regularly. The FPS counter hovers around 25 in-flight and 45 in the menu.

 

25 FPS in flight with lower details,  without (I guess) any other enemy plane on sight, is way below what you should get with your config (and way below the minimum acceptable, which is 45 FPS).

 

Don't bother playing with overclocking right now because you should be fine without it on minimum settings, so try to find your problem first then solve it. When you will get decent FPS you might try to improve it with overclocking.

 

What do you mean "VR is eating a very large portion of my CPU"? Which process? How much CPU? Clearly that is where you should look for your problem because you should not have any other process than il2 eating that much CPU.

[No601_Prangster]

The Rx470 is almost 30% slower than a GTX 1060 so you're never going to get decent performance.

Edited January 16, 2018 by No601_Prangster

[dburne]

The Rx480 is almost 30% slower than a GTX 1060 so you're never going to get decent performance.

 

That would be my guess as well.

[haltux]

The Rx480 is almost 30% slower than a GTX 1060 so you're never going to get decent performance.

 

Decent, maybe not, depending on your standards, but clearly RabbitFoehammer does not get what he paid for. He gets 25 FPS where I easily get 90 FPS with my GTX 1070 and similar CPU, even with some Super Sampling (again, with no enemy planes on sight).

 

According to benchmarks, my GTX 1070 is 75% faster than a RX470. And IL2 BoS is largely dependent on CPU so there is no way a 75% boost on the GPU implies a 75% boost in terms of FPS. The difference should be smaller. And in this case my configuration is 250% faster. Something is wrong somewhere.

[HansBlitz]

I am using a RX480 with just 4GB. My processor is an I5-7500 and I have 16 GB ram. I am using balanced settings but shadows off and ASW off. I am getting 45 fps on Kuban maps. At altitude and on the other maps i sometimes am getting 50~65 fps. I am also using the MSI command center to bump processor to 102.6%. Command center says could go to 103 but any higher than 102.6% and I get system crashes.

 

I don't have issues with motion sickness at 45 fps but seem to have a better tolerance to that than some of my relatives that have tried my VR.

Edited January 16, 2018 by HansBlitz

[HansBlitz]

Oh I almost forgot to say that I am using the Radeon wattman settings in to run the RX480 harder than the stock settings.

[No601_Prangster]

My old system was a 1060 and non K i7 3770 with 1333 memory. With this and the Rift the 1060 could only manage 60% GPU usage due to CPU and memory bottlenecks. When I upgraded to i5 7600k and 3000 memory the bottleneck disappeared and I could achieve 100% GPU usage. Now I have a 1080 and a nicely balanced system for 90 FPS.

[Starcos]

 

Meanwhile War Thunder runs beautifully on Rift with very decent FPS at medium or even high settings. is IL-2 just poorly optimised for VR?

 

 

No, WT that much simpler.

[ironk79]

The Rx470 is almost 30% slower than a GTX 1060 so you're never going to get decent performance.

i have a gtx 970 which is about 20% slower than a gtx 1060, still manage 90fps most of the time on "mid" settings. No fancy stuff /no AA, SS etc.)

my stats from another thread:

"

Settings:                            

- High

- Shadows: low

- Landscape Detail: 2x

- Landscape Filter: Sharp

- HDR, Sharpen aktive

- Dynamic Resolution 0,5

- Gras normal

- No SSAO,no AA,

- no Supersampling or ASW in Oculus Tray tool

 

My System:

- i5 4690k @4,1Ghz

- GTX 970 slight overclock

- 8GB

- SSD

 

Just yesterday i did a 4vs4 quick Mission, Stalingrad summer Map with light clouds. Constant 90fps for 99% of the time. Still a little headroom when changing to balanced."

[161snails]

This may not make any sense but I’m playing BOX on a MSI gt72vr system, not the best but not the worst laptop. I was pulling my hair out a little with stutters and alike until I hit on this setup.

Ultra settings

1.7 in occulas tray tool

No shadows

Normal draw distance

No mirrors

Ssa and hdr on

4 x aa

Grass normal

And target FPS 50

 

The result 45fps steady no matter what, stuttering gone smooth as silkish. Ok it’s not 90 but tbh I don’t even notice.....looks amazing and flys well

Ohhhh and btw that’s with a rift setup x 2 sensors.... can’t go back to flat screen