RX 6900 XT Performance settings

[WipeUout]

Anyone experiencing stuttering with the RX 6900 XT.  I get what I would call "micro-stuttering", tried all I could find online as possible cause without any change.  I play at 4k and locked my FPS to 60, which is the max frequency of my 60" TV at 4k.  Stuttering is mostly apparent when looking sideways from cockpit but very subtle.  If you have the same GPU, can you share your settings?

 

Additional info:  Updated BIOS, Chipset, etc.  Using latest Adrenaline driver 21.7.2 but no difference with 21.6.2.  My PSU is 1200W Thermaltake, no shortage of power.

 

Additional findings:  Setting VSynch on in DCS instead of in Adrenaline provide a significantly more smooth output with virtually no tearing but still some small stuttering.

Edited August 4, 2021 by WipeUout
New info and findings

[RackMonkey]

Add me as having the exact same problem. The only difference is I'm using VR.

 I can get rid of most of the stutters but resolution has to be so low as to negate having the top AMD card. I also need a bunch of AA that really drags the FPS into the toilet.

Edited August 4, 2021 by RackMonkey

[Lurker]

Have either of you tried turning off HAGS in Windows settings? I'm team green (RTX3090) but it did wonders for my frame-times in VR. It's worth a try. If it does nothing or brings down your performance you can always turn it back on again. 

[Lange_666]

13 minutes ago, RackMonkey said:

Add me as having the same problem. The only difference is I'm using VR.

 I can get rid of most of the stutters but resolution has to be so low as to negate having the top AMD card. I also need a bunch of AA that really drags the FPS into the toilet.

 

With an AMD 6900XT because your signature says 2070?

 

Edited August 4, 2021 by Lange_666

[RackMonkey]

Mines turned off. I just transitioned from a 2070. I would have stayed team green if I could have found a 3090 that I didn't have to take a mortgage to get. I just really want to see what my G2 can do but the 2070 couldn't push it hard enough.

 

@Lange_666, just got it and don't have all my sig's changed yet.

 

Edited August 4, 2021 by RackMonkey

[Lange_666]

On 8/3/2021 at 9:46 AM, WipeUout said:

I play at 4k and locked my FPS to 60, which is the max frequency of my 60" TV at 4k.  Stuttering is mostly apparent when looking sideways from cockpit but very subtle.

 

TrackIR to look around?

Does it drop below that 60 FPS when looking sideways?

[WipeUout]

''TrackIR to look around?

Does it drop below that 60 FPS when looking sideways?''

 

Yes, I use TrackIR.

Dip in FPS when looking sideways happens often and is pretty much related to view complexity or what is happening.  Smoke and explosions are the worst and really need some optimization.

 

After several tests, I finally got butter smooth result but still seeing some very small stutters which I think are not related to my hardware but more with DCS.  I had to a do clean reinstall of the AMD drivers only.  I do not have the Radeon software interface anymore but all the different setting were either slowing down FPS, causing more stutter/tearings/artefacts or simply nothing at all. I also messed around with GPU clock, voltage and VRAM speed which gave 2-3 FPS more but crashing the game after 20-30 minutes of play and no improvement on smoothness of the video.

 

Locking my FPS with VSynch within DCS give me the beat results.  A butter smooth video is so nice!

Edited August 5, 2021 by WipeUout
adding quote

[Lange_666]

6 hours ago, WipeUout said:

'Yes, I use TrackIR.

Dip in FPS when looking sideways happens often and is pretty much related to view complexity or what is happening.

 

When your FPS dips below the TrackIR pull rate, you get stutter, very noticable when looking sideways because the faster the image moves, the more you'll set it.

It's important to keep your FPS above the pull rate and then cap your FPS to that value.

[HansPeter1981]

Just to make sure, you have DCS installed on it's own SSD? I chased micro stuttering for a year. More Ram, page file settings, cpu gpu tweaks... nothing eliminated it. But one day I bought a 512GB SSD put DCS on there exclusively (before that windows and dcs was on the same ssd)... never had any stuttering ever again.

 

Also use Trackir5 6800xt 2700 Ryzen OC to 3900 on 8 cores SMT off, Vsync on. Graphics 4k quite extreme to high except Ground shadows(disabled) 95% of all times 60fps since my 4k 32" has 60hz max. Monitor has adaptive sync but anything below 56 fps starts to feel not as smooth and responsive then 60fps. Looking forward to vulkan  

[Lange_666]

4 minutes ago, HansPeter1981 said:

Monitor has adaptive sync but anything below 56 fps starts to feel not as smooth and responsive then 60fps.

 

That is a TrackIR issue. If your FPS dips below the TrackIR pull rate (120/60/30) real smoothness is gone.

[WipeUout]

Do we have any control over TrackIR pull rate?  Is this something that can be adjusted?

 

@HansPeter1981 : Thanks for the suggestion about having DCS on a separate SSD.  I do have two M.2 SSD but my second is less performing than my first one were DCS and win10 reside.  I will give it a try though.

 

Update:  No apparent effect from moving DCS to another M.2 SSD.

Edited August 6, 2021 by WipeUout
update

[Lange_666]

5 hours ago, WipeUout said:

Do we have any control over TrackIR pull rate?  Is this something that can be adjusted?

 

No.

[WipeUout]

Final update on this subject:

 

The RX 6900XT card is surely a beast that will provide steady 60 FPS in 4K.  The Adrenaline Software from AMD can be used to slightly improve performance by increasing GPU and VRAM clocks but not much to the expense of crashing or corrupting the video with weird artefact but this is very dependent on your own card, or silicone lottery.  Other setting on Adrenaline such as Anti-Lag, Image Sharpening or Enhance Synch will not do much and instead decrease your FPS.  I found that locking the FPS within DCS provides the smoothest video as opposed to using the Adrenaline software to fix FPS.

 

The RX 6900XT will not solve stuttering generated from DCS such as explosion/smoke, scripts, messages or connection issue.  It will make these issue more apparent though.