Low FPS on VR despite everything on lowest setting

[JP18]

I have an Oculus Rift S which with my rig i7 4790k rtx 2060 and 16gb ram  struggles to pull off 80fps most of the time, it always seems to be stuck on 40 fps but does stick to 80fps when there are hardly any planes nearby, the game stutters when shooting down an enemy plane and i have turnt ASW off and tried lowering the supersampling on the coulus debug tool and steam vr in which both have failed to give me better fps, i'm wondering whether to upgrade my rig as my cpu is relatively old or maybe the gpu is not strong enough for this game in vr may be the problem but other vr games run exceptionally well on high and even ultrain some cases, any suggestions on how to make the game run a bit smoother?

[ICDP]

I would say it's the CPU more than the GPU.  My understanding is a 2060 is roughly 1080 levels for performance.  So it should be OK for a Rift S.

[E69_Qpassa_VR]

17 minutes ago, ICDP said:

I would say it's the CPU more than the GPU.  My understanding is a 2060 is roughly 1080 levels for performance.  So it should be OK for a Rift S.

this is easy to check with the FpsVR tool

 

https://store.steampowered.com/app/908520/fpsVR/

 

 

Red lines or orange lines are an undesired performance.

[JP18]

Does the Rift S support FPSVR? if so I'll download it and post the results also thank you for the replies. 

[E69_Qpassa_VR]

Mmm it should work with any HMD but I'm not sure if it works if you are using Open Composite.

[21.Gr.CT.Ludovisi]

IMHO VR performance are getting worse every update: I was in VR in mid-2019 and this game run quite well, now it is a slow motion (9700+2080+riftS).

Edited January 1, 2021 by I./SG1.Ludovisi

[Bernard_IV]

What speed is your ram at?  Is your thermal paste fresh and do you have good cooling?  Thermal throttling could be an issue, make sure everything is running as it should be and go into your bios to make sure your ram is set at the proper speeds.  You can turn off hyperthreading in IL2 and your chip will run a bit cooler with more single threaded performance.  Use the task manager to see where you are at and make sure you aren't using up all of your Vram.

[Panzerlang]

I re-did my thermal paste day before yesterday, OMG, saved 20c and saw significant performance increase. 87c is not good for VR frames (though smoothness was already superb).

Edited January 1, 2021 by JG51-Hetzer

[JP18]

This was the result it seems to be the CPU not doing too well the cpu cooler thermal paste is inefficient now and sadly i do not have any more I will have to buy some, the screenshot was taken at the start of a career mission with 4 planes in render distances fps would jump to 80 very briefly and jump back down to 40 again. 

Also ram speed is drr3 at 1600mhz I believe the solution is that I just need to upgrade my pc.

[Dutch2]

Yep an upgrade would be better, only right now new hardware like an RTX3000 and an AMD5000 are very difficult to get at an normal price, so here some tips you can try on your actual rig. 

To be sure did you enable the XMP mode for memory in your BIOS? 

Disable also the HT in the BIOS, some here do face performance reducing as the HT is enabled. 

I also do see the CPU temperature is a bit high, buy an spraycan with air and blow out your Vcard, PSU, cooler and case. 

Remove the side panels from your case and see while playing if the temperature is lower, some cases are prone to have heatspots, were the heat is being trapped. 

Win10; Close all the not needed software and MSservices. 

Still using an HD consider an SSD, can always be reused for your new build. 

 

But overall, I feel your pain, and despite some people here are telling: I can run BoX-VR 90fps straight on my old GTX1060 or RX480, its in my noble experience complete bullshit. BoX-VR needs a beefy outfit, here some inspiration for your future upgrade plans 

 

Edited January 2, 2021 by Dutch2

[E69_Qpassa_VR]

16 hours ago, JP18 said:

This was the result it seems to be the CPU not doing too well the cpu cooler thermal paste is inefficient now and sadly i do not have any more I will have to buy some, the screenshot was taken at the start of a career mission with 4 planes in render distances fps would jump to 80 very briefly and jump back down to 40 again. 

Also ram speed is drr3 at 1600mhz I believe the solution is that I just need to upgrade my pc.

your GPU and CPU are barely used!

[Georgio]

On 1/1/2021 at 12:55 AM, JP18 said:

I have an Oculus Rift S which with my rig i7 4790k rtx 2060 and 16gb ram  struggles to pull off 80fps most of the time, it always seems to be stuck on 40 fps but does stick to 80fps when there are hardly any planes nearby, the game stutters when shooting down an enemy plane and i have turnt ASW off and tried lowering the supersampling on the coulus debug tool and steam vr in which both have failed to give me better fps, i'm wondering whether to upgrade my rig as my cpu is relatively old or maybe the gpu is not strong enough for this game in vr may be the problem but other vr games run exceptionally well on high and even ultrain some cases, any suggestions on how to make the game run a bit smoother?

 

Bear in mind that when it says 40fps that is per eye so the correct fps is actually 80fps which is exactly where the rift S should be in IL-2.

Make sure that your 2D resolution is as low as bearable for your monitor to reduce the overhead on the GPU.

[Dutch2]

28 minutes ago, Georgio said:

 

Make sure that your 2D resolution is as low as bearable for your monitor to reduce the overhead on the GPU.

 

I would also think of that, but it isn’t. Testing is very easy, run a lonely Qmission in a clear sky, at a decent hight so there is no interference with the terrain. Watch if your FPS is straight, if so, shutdown your monitor watch the FPS and then back on power again. You only will notice the spike in FPS because of your did pushing the monitor off&on.   

[Georgio]

31 minutes ago, Dutch2 said:

 

I would also think of that, but it isn’t. Testing is very easy, run a lonely Qmission in a clear sky, at a decent hight so there is no interference with the terrain. Watch if your FPS is straight, if so, shutdown your monitor watch the FPS and then back on power again. You only will notice the spike in FPS because of your did pushing the monitor off&on.   

 

You monitor being on or off makes zero difference to what the GPU is having to do, it renders the 2D scene on the monitor regardless.

However if you have the 2D scene at a high res., windowed etc then that gives the GPU extra workload or at least that's my understanding of it.

[JP18]

I disabled HT and enabled XMP on my BIOS however none of these seemed to give me an fps boost it just seems that i will need to upgrade my cpu and ram and also imrpove the cooling of my pc i will just have to tolerate 40fps in the meantime. 

[Dutch2]

On 1/2/2021 at 4:31 PM, Georgio said:

 

You monitor being on or off makes zero difference to what the GPU is having to do, it renders the 2D scene on the monitor regardless.

However if you have the 2D scene at a high res., windowed etc then that gives the GPU extra workload or at least that's my understanding of it.

 

 

So as I wrote down test this by your self,  a proper test method can be found here: https://forum.il2sturmovik.com/topic/66924-syn_vander-benchmark-v6-to-measure-il-2-performance-in-monitor-vr/ and publish your results.

Its been now a year later since my testing so who knows something has been changed by 1C.

 

Meten is weten!

 

EDIT, still waiting, come on man, that is not that difficult finding real facts as proof and not based on feelings from your belly. 

Edited January 23, 2021 by Dutch2

[Alonzo]

On 1/2/2021 at 9:28 AM, JP18 said:

I disabled HT and enabled XMP on my BIOS however none of these seemed to give me an fps boost it just seems that i will need to upgrade my cpu and ram and also imrpove the cooling of my pc i will just have to tolerate 40fps in the meantime. 

 

It's the CPU that is holding you back. Try 'Balanced' settings, switch off grass, switch off shadows. You can also try OpenComposite, which bypasses SteamVR and gives you a little extra performance.

 

Other things to try: You can disable ASW using OpenComposite. This will allow the frame rate to go below 80, but not jump down to 40. You might find that actually works better for you. Alternatively, accept that 40 (with frame doubling to 80) is all you're going to achieve, and instead use OpenComposite to force 40 ASW all the time. Then it won't try to jump between 40 and 80, and you might find that's a 'smoother' experience. If you do that, you can also tune your settings a bit higher because your system has 25ms for each frame instead of 12.5ms.

[Algy-Lacey]

On 1/2/2021 at 4:28 PM, JP18 said:

I disabled HT and enabled XMP on my BIOS however none of these seemed to give me an fps boost it just seems that i will need to upgrade my cpu and ram and also imrpove the cooling of my pc i will just have to tolerate 40fps in the meantime. 

 

My current PC is even worse than yours, i5 6600k 3.5GHz with no overclock, 16Gb RAM DDR4 2100 Mhz, GTX 1060 6Gb, Oculus Rift CV1. I could never achieve the Rifts 90 fps, but found that forcing ASW on, 45 fps, my system can handle in game graphics settings that look quite good. Your best bet is to follow Alonzo's advice and use ASW to achieve 40 fps (this might sort out the stutters, which could be your PC going from 80 fps to ASW on = 40 fps). To achieve 80 fps in most in-game situations, you will need to upgrade your PC. Also, going from Steam VR to Open Composite + Oculus Tray Tool (for ASW settings) might gain you some fps.

 

I hope that you get something sorted that's satisfying to use.

 

Algy-Lacey

Edited January 7, 2021 by Algy-Lacey

[JP18]

Thank you guys for all replying!

[RG-Predator]

On 1/2/2021 at 10:28 AM, JP18 said:

I disabled HT and enabled XMP on my BIOS however none of these seemed to give me an fps boost it just seems that i will need to upgrade my cpu and ram and also imrpove the cooling of my pc i will just have to tolerate 40fps in the meantime. 

Your XMP profile has to have the proper settings. You can find those on the RAM sticker. As E69_Qpassa_VR said, your GPU and CPU are hardly used. Your temps are exceptionally high for such low usage. It's not video settings or HT settings. It's cooling. Increase your fan speed profile, vacuum your radiator/fans/mobo, change your coolant, ensure you have airflow and replace your thermal paste. More than likely your performance issues are thermal throttling.

[JP18]

Hello folks in the end I just gave up on VR the performance issues and the poor quality was not worth the immersion, however I bought a DelanClip and now use TrackIR which works wonderfully for me thanks all for the replies maybe if I save some money I can upgrade my rig and HOTAS (TOO EXPENSIVE ATM!!).