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Drivers & Software

otavioc
Adept I

RX 6800 Poor Performance in VR

Having issues using the latest drivers (20.12.1) with an RX 6800 and a 3600x. Getting constant frame drops in VR, which makes up for a terrible experience.

36 Replies
benman2785
Big Boss

Re: RX 6800 Poor Performance in VR

what kind of framedrops
what games
which VR system

we need more info dude

PC: R7 2700X @4.1GHz + RX 580 4G (1500MHz/2000MHz CL16) + 32G DDR4-3200CL14 + 144hz 1ms FS P + 75hz 1ms FS
Laptop: R5 2500U @30W + RX 560X (1400MHz/1500MHz) + 16G DDR4-2400CL16 + 120Hz 3ms FS
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jaboust
Adept I

Re: RX 6800 Poor Performance in VR

Hello,

I have the same problem with Valve Index and AMD radeon rx 6800xt. I have R5 5600x and I would like to first point out that these problems started when I installed the new GPU (old was gtx 1060). I used DDU to remove old drivers.

In most of SteamVR games these GPU frametime spikes occur. Interestingly, not in Half-Life: Alyx. The stuttering is more prominent with higher Index refresh rates. Changing supersampling in SteamVR to manual from auto does not have an affect. Neither does disabling or enabling motion smoothing.

I have observed through radeon software and fpsVR that the GPU utilization constantly varies between 10% to 100%.  Similarly, the clock frequency varies from very low MHz to maximum. I have not touched any tuning settings. Here is an image of what these look like. Sorry for the poor quality, they are snapshots from VOD.rx6800xt.pngI have not tried to re-install Windows. This is what I shall try later on. Could I lock the GPU clock frequency to 100% to reduce the utilization variance?

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benman2785
Big Boss

Re: RX 6800 Poor Performance in VR

@jaboust 

did you cleaned your old Nvidia-Driver with DDU in safe-mode?

if not: clean both drivers AMD and Nvidia in safe-mode and try again

PC: R7 2700X @4.1GHz + RX 580 4G (1500MHz/2000MHz CL16) + 32G DDR4-3200CL14 + 144hz 1ms FS P + 75hz 1ms FS
Laptop: R5 2500U @30W + RX 560X (1400MHz/1500MHz) + 16G DDR4-2400CL16 + 120Hz 3ms FS
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jaboust
Adept I

Re: RX 6800 Poor Performance in VR

Hello,

yes indeed I did perform the DDU in safe-mode. 

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jaboust
Adept I

Re: RX 6800 Poor Performance in VR

Here is a video of what it looks like. I am playing Walking Dead: Saints and Sinners with Valve Index set at  144Hz. Later on I switched back to 90Hz to be able to play to some degree.

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benman2785
Big Boss

Re: RX 6800 Poor Performance in VR

cant watch video as of now

1. disable Win10 auto-driver-install
2. update Win10 to 20H2
3. run DDU in safe-mode to clean old AMD driver
4. download 20.12.1
5. reboot and try again

PC: R7 2700X @4.1GHz + RX 580 4G (1500MHz/2000MHz CL16) + 32G DDR4-3200CL14 + 144hz 1ms FS P + 75hz 1ms FS
Laptop: R5 2500U @30W + RX 560X (1400MHz/1500MHz) + 16G DDR4-2400CL16 + 120Hz 3ms FS
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jaboust
Adept I

Re: RX 6800 Poor Performance in VR

Thank you,

I will try this later on today. Hopefully the video will be visible at some point.

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otavioc
Adept I

Re: RX 6800 Poor Performance in VR

Did all of that. Running latest Windows version with a 3600x, 32gb ram and an RX 6800 on latest drivers (tried both available drivers and got the same results). There seems to be a bug where SteamVR won't properly turn on motion reprojection resulting in spiky frametimes. Tested both in IL-2 Great Battles and DCS World, and both have the same behavior. Instead of the game locking itself to 45fps with reprojection, it fluctuates above it and sometimes locks itself to 60fps resulting in extreme stutters and overall lack of smoothness. Another strange behavior is that when you remove focus from the game windows, the graph changes completely and the stutters seem to stop. I believe there's some weird interaction with AMD drivers and SteamVR which causes this issue.

2pZfIu1

pokester
MVP

Re: RX 6800 Poor Performance in VR

I wish I had an answer for you, I just wanted to let you know I have no issues on my 3600 & 32gb ram with 2070 super and now with a 3070. So I think it must be AMD driver related. I would send all of your information to AMD for sure. 

They will be the only ones that can fix a future driver.

I would also send the issues to Valve Support as they likely have contacts for AMD that you and I don't and maybe can put more pressure on a fix from their end.

In Radeon Settings there is a Bug Report tool too you can submit the issue or

You can contact AMD support here: https://www.amd.com/en/support/contact-email-form

Good Luck!