Unable to get 90fps in VR

[sfrost]

System specs:
CPU - Ryzen 5 1600 @ 3.7Ghz
GPU - Sapphire pulse Vega 56 @ 1600Mhz Core 900Mhz Memory 19.1.1 Adrenaline drivers installed
HDD - 2TB Hybrid SSHD
VR Headset - Lenovo Explorer Windows Mixed Reality (Automatic display quality)
Windows 10

Steam VR SS set to manual overide and 100%

I am trying to get the game to run on it's lowest settings at the moment and using the ingame bench mark to ensure I am getting a stable 90fps but I can not get close the framerate is bouncing all over the place between 45 and 90. My cpu has an average usage of 20% and my GPU usuage never peaks above 80 just fluctuates between 20 and 80.

Edit: Don't know if this makes a difference but in the benchmark I see the ingame CPU monitor saying 94 whilst radeon and hardware monitor report cpu usage in the 20% range

I have tried a fresh install of assetto corsa and steam vr to no avail. Looked through the various discussions and still can't seem to find a solution so hoping someone could help me out with this.

[Mr Crisp]

Go into Steam VR settings and go to the Video section and make sure Application Resolution is set to Manual Override, just tick the box and make sure its at 100%.

Steam VR will change the super-sampling amount automatically which can lead to performance issues in some games.

[sfrost]

Originally posted by Mr Crisp:

Go into Steam VR settings and go to the Video section and make sure Application Resolution is set to Manual Override, just tick the box and make sure its at 100%.

Steam VR will change the super-sampling amount automatically which can lead to performance issues in some games.

I have tried this and still not getting stable 90. Also tried turning it down further to see if that improved performance but still no luck.

[commodore128]

Check your graphical settings in assetto Corsa, Anti-Alaisiing, Shadows, you might have Mod's eating it up. There also might be background app's taking your CPU, like Virus checker, check task manager. Try another race track also. Maybe try the BETA version of Steam VR, also maybe install older AMD driver.

[sfrost]

Originally posted by commodore128:

Check your graphical settings in assetto Corsa, Anti-Alaisiing, Shadows, you might have Mod's eating it up. There also might be background app's taking your CPU, like Virus checker, check task manager. Try another race track also. Maybe try the BETA version of Steam VR, also maybe install older AMD driver.

Graphical settings are all on the lowest they can go and I have no mods installed since it's a fresh copy of the game. Task manager reports around 5% CPU usage before anything is up and running. Only background apps running are steelseries, avast, radeon, steam, bluetooth connector. How can I get an older version of AMD drivers?

[commodore128]

Originally posted by sfrost:

Originally posted by commodore128:

Check your graphical settings in assetto Corsa, Anti-Alaisiing, Shadows, you might have Mod's eating it up. There also might be background app's taking your CPU, like Virus checker, check task manager. Try another race track also. Maybe try the BETA version of Steam VR, also maybe install older AMD driver.

Graphical settings are all on the lowest they can go and I have no mods installed since it's a fresh copy of the game. Task manager reports around 5% CPU usage before anything is up and running. Only background apps running are steelseries, avast, radeon, steam, bluetooth connector. How can I get an older version of AMD drivers?

https://www.amd.com/en/support/graphics/radeon-rx-vega-series/radeon-rx-vega-series/radeon-rx-vega-56

There are two drivers in the above link. Maybe restart you computer, maybe you have updates that might cause it. Make sure you have Windows10 drivers for the Mixed Reality heatset?

[commodore128]

seems like they have newer drivers to your's, install that, reboot. I'm running steam VR beta 1.3.6, you have right click on it, OPT in to BETA, if the new drivers and reboot fail. on a side not I've always wondered how AMD and NVIDIA go with VR performance. I'm running Occuls DK1 and running Nvidia Geforce 750ti with AMD FX6300. I can get max about 90 frames, if I turn things down and leave STEAM VR at 100%. My DK1 can only display at 60hz. I can maintain about 60hz with 150% SS, I think resolution is at 1268x1754 per eye. My DK1 physically can only display 640x800 Pixels per eye.

[sfrost]

Latest drivers installed and still can't get 90fps with lowest settings. Steam settings are left at 100% with manual overide turned on and advanced supersampling filtering turned off. Each eye is rendered at 1593 x 1593. According to steam the recommended setting for my GPU is 100% which seems wrong as I had a rx480 before and it recommended the same settings for that as well.

[CaTaPulT]

In the WMR software, click on the HMD icon on the left pane, at the bottom click on "See More" and then "Settings", Choose "Headset Display" and look for "Experience Options" and click on "Change", by default it's set to "Automatic"...... change it to 90fps and see if that helps. I just got my Samsung Odyssey yesterday and seems the "Automatic" setting was stuck at 60fps no matter what VR software I ran. I'm using a 1080ti and get solid 89 - 90 fps in Asseto Corsa by doing this.

[sfrost]

Originally posted by CaTaPulT:

In the WMR software, click on the HMD icon on the left pane, at the bottom click on "See More" and then "Settings", Choose "Headset Display" and look for "Experience Options" and click on "Change", by default it's set to "Automatic"...... change it to 90fps and see if that helps. I just got my Samsung Odyssey yesterday and seems the "Automatic" setting was stuck at 60fps no matter what VR software I ran. I'm using a 1080ti and get solid 89 - 90 fps in Asseto Corsa by doing this.

Been running with it set to 90 from the start. Changed the display settings to be fixed to high but also tested on medium, low and very high to see if it made a difference but it did not. Thanks for the suggestion though will keep trying

[commodore128]

get Steam VR performance test from STEAM, run that, see what it gives you. I might be the GPU isn't getting enough power, maybe limited Power Supply or the Power cable isn't connected to the GPU. Maybe run the 3DMark to see if the GPU is performing like it should.

[sfrost]

Ran the Steam performance test and system performed as expected, GPU ramped up to full usage 95%+ with the score at the end of the test being 11 and only 3 frames being CPU bound.
GPU is powered by an EVGA 650W bronze modular power supply using 2 seperate cables for each of the 8pin connectors for the graphics card and since i have undervolted the card it draws ~200W at load. Will download and try 3DMark and see what I get.

Do I need to run games in windowed mode or anything like that? Just going through the performance test and noticed it was in windowed mode but all the games I run in VR i have set to fullscreen

[commodore128]

Originally posted by sfrost:

Ran the Steam performance test and system performed as expected, GPU ramped up to full usage 95%+ with the score at the end of the test being 11 and only 3 frames being CPU bound.
GPU is powered by an EVGA 650W bronze modular power supply using 2 seperate cables for each of the 8pin connectors for the graphics card and since i have undervolted the card it draws ~200W at load. Will download and try 3DMark and see what I get.

Do I need to run games in windowed mode or anything like that? Just going through the performance test and noticed it was in windowed mode but all the games I run in VR i have set to fullscreen

For me Windowed of Assetto game runs at 1280x800. How do you mean you undervolted?

[sfrost]

AMD Polaris and vega gpus with stock settings are not optimised. You can gain quite a bit of performance and reduce temperatures by changing a couple of settings in AMD wattman which I have done. Tested the setup for stability and it has no problem holding the new clock speeds for over an hour at max load with temps not going above 70.

Have just done a reset of windows so will try again and see if I windowed mode and a lower resolution works better

[BRT Cobra]

amd cpu

[sfrost]

Originally posted by BRT Cobra:

amd cpu

Doesn't appear to be CPU limitation, used the advanced frame timing graph from steamVR to look at whether the CPU or GPU was the bottle neck. CPU has the frames ready in 6-8ms whilst the GPU was 9-11+ms but the GPU is not operating at 100%, max 65% usage so something is going wrong with the way the game and GPU are talking I believe. Gonna try a new install of the drivers and see if I helps.