Virtual Reality CPU Vs GPU Bottlenecks - Resolution Vs FPS 💻

[@DayDreamerVR]

There are timestamps so feel free to skip to any relevant part - thanks for watching 👍

[@AllThingsPico]

Thanks for the video! One really needs to know how to interpret all this data, while much of it can usually be misleading. I finally got my PCVR set up (4080 + 14700K), so it's finally time (after almost 4 years LoL) to play Alyx "the way it's meant to be played" :) Also got G29, pedals and a shifter, but I still need a racing seat and a lot more space to put it in.. BTW, congrats on 2K subs! You just blew through that last K :)

[@DayDreamerVR]

Thanks - I can't believe how quick the last 1k subs has happened, I think I just happened to have a couple of very lucky videos, which gained alot on their own! So good to hear from you! Sounds like you have an awesome setup, enjoy Half Life Alyx, the graphics are amazing! I have barely any space to fit my racing rig, I managed to fit it in a footprint of 1.6m x 68cm! I had to make the frame myself out of wood though 🤣 Also I did look on ebay for real car seats-you can get them quite cheap but they can be quite big 👍

[@akeelshah7904]

mate ur spitting facts right there i wish more people understood facts alot of people have their settings awefully

[@DayDreamerVR]

Thanks! I will continue to try and help people optimise their setups! 😀

[@akeelshah7904]

@@DayDreamerVR GG man! I help when I see people struggling in VR chat and there's always something that can be done to balance out a system and it shows even with Ur 4090 optimization is significant not only in performance but overall system power will be up for no difference in visuals with the wrong settings

[@Mr-Felix]

Thanks for the vid. Knowing all of this helps quite a bit. Still, you should try increasing the volume of your voice during recordings because it was a bit quiet. Still, thanks a lot

[@DayDreamerVR]

No problem, thank you for the feedback, I'll see what I can do 👍

[@B4nan0n]

really useful info in your video, thank you so much! but i was wondering. at the end of the video you were using virtual desktop with the encoder h264+, and at the same time recording with HEVC probably? i just ask because encoding with both wasn't hurting your performance?

[@DayDreamerVR]

Glad it was useful 👍 I can't remember for certain, but I think I was recording on the headset itself and not with my PC. This could still have hurt the decoding latency on the headset due to a higher load on the headset, but it shouldn't have affected PC performance 👍

[@ricepony33]

I’d pay real money for an automatic optimization tool for PCVR.

[@spidermonkeynr1]

Now try that with changing the render scale first in oculus software to 1.5 or 1.7 with the rest on default. That's where you make the biggest changes. I do wonder what settings would be best for me because I can't figure it out. I have an i5 11400f with 3060 12gb set on 100% resolution in steam and high on virtual desktop on 90hz renderscale 1.0 and all on ultra in half life and it doesn't run smooth

[@DayDreamerVR]

Yeah, I should have said-I was using steam link to start with, but it does have a low encode resolution, like you say, increasing the resolution and using Oculus Link could give better image quality, but at higher latency. For your performance issue, I take it you have a decent router, and are connected on 5ghz band, and use an ethernet cable to your PC? I would recommend looking at the Virtual Desktop performance stats and fpsvr, to see if that shows whether your frame times, and gpu/cpu load aren't too high. Try reducing the resolution quality in Virtual Desktop until you get smooth performance, and then slowly work back up. Hope you manage to sort it 👍

[@virtuallyreal]

Hope you got HLA set to locked render scaling ( command line ) It will swing internal render Res based on frametimes and load otherwise🤪

[@DayDreamerVR]

I haven't! But I will now! Thanks 👍

[@leehudson1384]

Hi, can you tell me what headset you're using out of interest?

[@DayDreamerVR]

In this video I was using the Meta Quest 3. At the moment I also have a PICO 4 👍

[@TotallyMuffin]

can you do this on the game rec room it would help me out and if you did can you tell me how to get the best preformance i have a rtx 4060 and a i5-10400f

[@DayDreamerVR]

I never play rec room, but hopefully I can still help. I would choose Virtual Desktop with a 4060, and I would keep it at 72Hz, and I would set it to Medium graphical quality in Virtual Desktop. In Steam VR, I would set resolution to 100%. Then I would use the performance overlay from Virtual Desktop and use fpsVR, and see if your PC can maintain 72fps. If it can, then try raising the graphical quality in Virtual Desktop, and check again. If it can't maintain 72fps, then consider reducing the graphical quality in virtual desktop, or consider turning on synchronous spacewarp in Virtual Desktop to always enabled. If you turn on synchronous space warp then you might then be able to raise your graphical quality (as you only need to maintain 36fps and you will still get 72 overall) in virtual desktop. For the bitrate, I would possibly consider using AV1 10 bit - which you can set on the Virtual Desktop app on your desktop PC, and then try 100Mbps whilst you are doing all the above tests. Once you have got your graphical setting right for your PC, then you can try increasing the bitrate until it is at its maximum of 250Mbps, or until you start seeing performance issues. Make sure your PC is connected to your router with an ethernet cable, and make sure your headset is connected to your router on a 5GHz band. Hopefully your router is good enough for VR, and I hope you manage to tweak your settings for the best experience 👍

[@ХочуПрограммировать-й8л]

Thanks you so much. How did you get 2000 mbs wirelessly?

[@manuelsalgado9664]

Thanks you sir. Great informative videos. I have the quest 3 and am running a 3090ti. In f123 I’m struggling to get a smooth experience because of the choppiness. At 90hz I can hey a decent performance on medium setting. On my pico 4 I get a smooth 90 fps on ultra. Is there a way to tweak this more for the quest 3. Thanks in advance. Manuel

[@DayDreamerVR]

So I would check in steam vr what resolution it is running in both the PICO 4 and Quest 3 to see if they are running roughly the same resolution, as this can be changed in steam VR so that it is not the resolution set in Virtual Desktop. Then I would check fpsvr and the virtual desktop performance monitors to see if that helps identify what the difference is between both gaming experiences. Check the bitrate and the code (H264, H265, AV1 for example), so you can check they are both set the same. Even if everything is set the same, you might still find one headset performs better than the other. If this is the case but you still want to run at 90 fps, then you might have to reduce the resolution slightly. You can do this by setting the Quest 3 to ultra, but in steamvr setting the resolution to 95% for example. This way you aren't reducing the resolution as the next step down in virtual desktop and can do it gradually until performance is good, and that will make the most of image quality. Another option would be to try oculus link with a USB cable, and increase the bitrate to anywhere up to 960Mbps in the Oculus debug tool by copying and pasting the bitrate into the tool, might sound weird, but I get the best racing experience with Oculus link. Hope either option helps 👍

[@manuelsalgado9664]

Thanks. That’s great. I will try that today for sure. So steam vr settings overwrite virtual desktop settings no matter what? Or is that only for the resolution. Thx again.

[@DayDreamerVR]

@manuelsalgado9664 So Virtual Desktop sets what the 100% resolution figure is in steam vr, and then you can fine tune resolution in steam vr, however virtual desktop sets the encode resolution which is the actual resolution sent to the headset, so if you increase the resolution in steam vr it will make your pc work harder but have very little effect on image quality, and if you reduce the resolution in steam vr, it will reduce the amount of pixels which get used to make the final encoded picture and will reduce the load on your PC. Lowering the resolution though in steam vr gives you options between each of the resolution settings in virtual desktop 👍

[@manuelsalgado9664]

Got it. Thanks so much.

[@Adapto3]

Half life alyx is the best optimized vr game ever made. It will run smoothly even on 1080ti. Bad choice for example. Try Green Hell VR or Skyrim with 500 mods. You will see bottle necks in no time.

[@DayDreamerVR]

It all depends on what resolution and other settings you have it on. Yes HLA runs well, but up your resolution and you start stressing it. The point of this though was to show how you can adjust the bottleneck between your GPU and CPU, to allow you to share the load how you would like/need or to share it more evenly to get the most out of both 👍

[@Kebabpotatis]

How can i get the best performance possible with rtx 3070 + i5-12400f?

[@DayDreamerVR]

So whichever headset you are using, if you are using steam vr, then get fpsvr, and if using virtual desktop you will need to use the virtual desktop performance overlay as well, and start with the graphics settings low, and play each game and see how much load is on your cpu and gpu, and what the frame times are like, then gradually increase the settings until you are happy with the performance and headroom you have left. I did a virtual desktop settings guide which might help which can be found here, hope this helps: kzbin.info/www/bejne/Z2LFe3mYr9qdkJY