Nvidia Resizable Bar Fix

[firefox121]

Found yesterday, that , even I have my Resizable bar enabled in my bios and my nvida control panel info says resizable bar on, when I look into the latest nvidia inspector program, resizable bar is OFF by default, so I tried something, and enabled it for all the profiles.

Found a great improvement in DCS running trough OpenXR, I have retroprojection On and with shadows on medium, even max , all goes smooth as silk, (45 solid fps in all scenarios, even with the apache), no double view nor jitter...think is a great improvement for those like me that where thinking that RBAR was doing his job.

Hope it helps.

[Mars Exulte]

Afaik this does not work with DCS, whether you enable it or not, based on my investigation just a week or so ago. If something ACTUALLY functions, it will typically do so for everyone, or at least in repeatable, verifiable manner, which I have NOT seen clear evidence of anywhere yet.

[speed-of-heat]

7 hours ago, firefox121 said:

Found yesterday, that , even I have my Resizable bar enabled in my bios and my nvida control panel info says resizable bar on, when I look into the latest nvidia inspector program, resizable bar is OFF by default, so I tried something, and enabled it for all the profiles.

Found a great improvement in DCS running trough OpenXR, I have retroprojection On and with shadows on medium, even max , all goes smooth as silk, (45 solid fps in all scenarios, even with the apache), no double view nor jitter...think is a great improvement for those like me that where thinking that RBAR was doing his job.

Hope it helps.

just for clarity, are you suggesting that turning it on globally has an impact that turning it on just for the individual game does not ?

[WipeUout]

I don't think that rBAR is working in DCS.

Did a bit of research and when a feature is working, in the game profile of nvidia profile inspector, the little gear beside the feature is green.

If the feature is not working, the little gear icon stays blue.

 

nullnull

[speed-of-heat]

isn't green just the default ? 

[firefox121]

hace 10 horas, speed-of-heat dijo:

just for clarity, are you suggesting that turning it on globally has an impact that turning it on just for the individual game does not ?

Yes, This is, I  enabled it globally, not for game. And worked

hace 1 hora, speed-of-heat dijo:

isn't green just the default ? 

In my setup, default is disabled , thats is my post reason. I enabled It by default and K-boom no more sutters and smooth as silk.

Just saing, it works on my rig...easy to see if it works...

[speed-of-heat]

I honestly couldn't tell the difference from it being enabled and being disabled in the default profile 

Average Measurements							Delta				Observations
FPS	10% Low	1% Low	0.1% Low	app CPU(ms)	render CPU(ms)	GPU (ms)	FPS	app CPU	render CPU	GPU	Notes
68.36	59.32	55.14	53.98	14.77	12.83	13.93	0.00	0.00	0.00	0.00	Baseline test for Default Rebar
67.19	59.12	55.22	53.98	14.98	13.02	14.14	-1.17	-0.20	-0.19	-0.21	Rebar Set as Default profile

there is a small detriment to fps recorded with it enabled but honestly that's most likely to be a runtime variance, anything under 0.5ms is pretty suspect .

[firefox121]

Interesting test, but as I said, for me is a matter of perception, also fps, I am been able to fly the apache in marianas with shadows enabled at medium and IHADS enabled too and land in the carrier parked at harbour in the quickstart mission with RBAR enabled in the default profile, in my "old" 3080ti and i9-10850k, without it enabled , when I reached the supercarrier and enabled IHADS to see the flir image, my fps in vr dropped to 20ish and a little slideshow.....maybe in my rig is more noticeable than in a 4090....and a 12700kf.... 

Maybe it works on lower rigs and processors. Or something was wrong in my configuration.

Edited February 13, 2023 by firefox121

[WipeUout]

In games where rBAR is working and has been implemented, there is noticeable and even substantial increase in performance of up to 22% from what I saw in this youtuber's tests:

I doubt very much it is implemented in DCS.

From my own testing, I did not noticed any significant performance difference either. 

[jurinko]

ReBar stopped working since spring 2021 nvidia drivers. I still use a driver from 31st March 2021. 

[firefox121]

So even I have enabled it with nvidia inspector is not working?, my feels says yes!?

[British_Dragon_14]

I just noticed that it is not even available in 'NPI section 5' anymore.

[HoBGoBLiNzx3]

10 hours ago, British_Dragon_14 said:

I just noticed that it is not even available in 'NPI section 5' anymore.

I just turned it on yesterday in the newest NPI version? 

I saw improvements for sure. I also changed a few stereoscopic settings and the game looks and feels better than I've ever had it.

I don't think people really understand what this does. It just uncaps the transfer size for textures, AMD has a version of it too. It really takes stain off your CPU more than anything. If you're going to test, it will be interesting to see the CPU frame times in VR.. I also have HAGS on. 

As we've learned with VR frames rate isn't everything... Many people have 60fps and still get stutters, hit VRAM and RAM limits etc. 

If you have a top of the line system, you might not notice it until texture sizes increase in the future and 4k becomes more of a standard, still with DCS constantly pushing it's VRAM limitations it can't hurt to force on even if it isn't officially supported. It's doesn't need to be in the first place but it would obviously be more beneficial if it was.

[British_Dragon_14]

Edit: Video removed.

Thank you for the quick reply!

This is my currently unlisted test video that I am sharing with you. I am editing it as of now.

Most of the time I am getting 90Hz in my HMD but in the video it is obvious to me when it slips back to 45Hz. I am OK with the performance in this video but:

I would very much like to know your input on why I get pop in textures and very bad shimmering whilst flying along the beach looking at the thin line of wooden docks made for small fishing boats etc.

In the video at 22:38 you can see a building that is being constructed from bottom to top in real time. Very strange!

This is raw footage from a cropped 'window capture' to hide the VR lenses shape. I am also using the default resolution in OpenXR which says (something close to) 3100 x 3100 I believe. Even though the Reverb G2 is a 2160 x 2160 resolution HMD. I don't understand that. I am not using any OpenXR post processing.

DCS pixel density is set to 1.0.

Information as copied from the video description:

Testing OpenXR CAS & Turbo Mode, Over The Landing Beaches In a Reverb G2 V2 Also testing the new Nvidia AV1 Live Stream Encoder with OBS at 2560x1440p (16:9) with Window Capture and custom cropped settings. Constant Bitrate of 18Mbps. OpenXR Turbo: on. With CAS sharpening at 100%.

DCS: High & Ultra settings. All DCS in game AA settings switched off. If the frame rate looks higher than 45fps in the video, then the frames are 90fps in my HMD. 5/22/2023

PC Specs: Motherboard: Gigabyte Aorus Master Z690 CPU: Intel i9-12900k GPU: RTX 4090 Memory: 32G (2x16) DDR5 5600 MHz CL36 Corsair Samsung Storage: Samsung 980 Pro M.2 NVMe SSD x 3 CPU Cooling: Silent Loop 2 360mm Monitor: Samsung G9 32:9 (5120x1440) 240Hz Head Mounted Display: HP Reverb G2 V2 OS: Windows 11 & Marriage, both running on a turbo charged V12 SSD!

PS.

I have heard that in IL-2 GB's. People have had good results in VR, setting their Texture Filtering - LOD bias to -500 in the Nvidia Profile Inspector.

I am yet to try this in DCS.

My Nvidia Profile Inspector 2.3.0.13 version seems to have removed all BAR settings. But I remember forcing it on a couple of years ago. New Drivers maybe?

I am also running no Anti Aliasing in DCS. So maybe a simple OpenXR upscale of 10 to 20% would be enough for the shimmering? Instead of the DCS 'MSAA x 2' switched on. It is very heavy on my performance.

 

Edited May 27, 2023 by British_Dragon_14

[Kril_FC]

I also changed a few stereoscopic settings and the game looks and feels better than I've ever had it.

Can you provide this settings?


Sent from my iPhone using Tapatalk

[Kril_FC]

I also changed a few stereoscopic settings and the game looks and feels better than I've ever had it.

Can you provide this settings?


Sent from my iPhone using Tapatalk

[WipeUout]

13 hours ago, HoBGoBLiNzx3 said:

I just turned it on yesterday in the newest NPI version? 

Tested it yesterday with newest versionof NPI and it is still not working in DCS, probably not implemented yet.  The gear icon next to the rBAR option in NPI needs to turn green when enabled to confirm it is implemented in the game.  For DCS, the icon remain blue.

[HoBGoBLiNzx3]

33 minutes ago, WipeUout said:

Tested it yesterday with newest versionof NPI and it is still not working in DCS, probably not implemented yet.  The gear icon next to the rBAR option in NPI needs to turn green when enabled to confirm it is implemented in the game.  For DCS, the icon remain blue.

I do not believe that is correct.. I'm looking right above it with all the other settings in my NCP like the power mode, shader cache size, etc and they all have a blue icon. 

You should be able to force it on ANY game. 

[WipeUout]

Well, my tests show no gain and same results on or off.  And BTW, the latest version is 2.4.0.4 (march 2023) from the guy who codes it:

https://github.com/Orbmu2k/nvidiaProfileInspector/releases 

[HoBGoBLiNzx3]

9 hours ago, WipeUout said:

Well, my tests show no gain and same results on or off.  And BTW, the latest version is 2.4.0.4 (march 2023) from the guy who codes it:

https://github.com/Orbmu2k/nvidiaProfileInspector/releases 

I have that version as well. This option won't effect everyone equally. It is hardware and game dependent but that doesn't mean it's not enabled. It's a driver level option for hardware and what it does is uncap memory size transfers for textures... DCS texture sizes might not be large enough for it to matter but that doesn't mean it wont in the future and it takes stress off the CPU. Make no mistake, if you enabled it, and turned it on in NPI, it IS running... You just might not see any gains... currently.

Check below. 

"

Resizable Base Address Register (or Resizable BAR, as it’s known colloquially) is a new feature that improves communication between your processor and graphics card. It’s actually been part of the PCI Express specification for some time, but only now have manufacturers actually enabled it for use on the latest graphics cards, motherboards, and processors.

 

When you play a game, your GPU requests textures, shaders, and other assets from your CPU. These get stored in the graphics card’s video RAM, or VRAM, before getting drawn into an image and sent to your eager eyeballs. However, the CPU has historically been limited to accessing 256MB chunks of the graphics card’s VRAM at a time—which, with cards that have multiple gigs of VRAM, means making lots of little transfers one after the other. This creates a bottleneck that has only gotten worse as games have gotten bigger and more complicated."

https://www.pcworld.com/article/394720/faster-gaming-frame-rates-for-free-resizable-bar-explained.html

[diego999]

Can you do a benchmark? This is very interesting but something more than "game feels better" would be nice.

Will test tonight. 

[HoBGoBLiNzx3]

1 hour ago, diego999 said:

Can you do a benchmark? This is very interesting but something more than "game feels better" would be nice.

Will test tonight. 

Edit: Benchmarks change quite a bit depending on game, and hardware. While this is obvious and why I edited my comment, only you will be able to see if it helps your hardware..

 

Edited May 25, 2023 by HoBGoBLiNzx3

[diego999]

Tested several aircraft and missions in all the maps I have. No noticeable difference.

[corbu1]

I can’t see any differences with Resizable BAR on or off.

If DCS supports it, shouldn‘t ED Def’s be able to confirm this?