How disable Nvidia resizable bar?

[wunkley]

Really basic question, but I'm about to set up resizable bar for my 3090Fe with my new motherboard for the first time.

However, I've just discovered that some games have quite a sizable loss of performance with it enabled (eg Watch Dogs Legion), so how do you 'turn it off' once it's set up?

Is it just the bios option that controls it or can you do it via Nvidia Control panel?

 

[hyperseven]

AFAIK the drivers only enable/use it in certain titles which benefit from it. You can also force it on via NVInspector.

 

[wunkley]

AFAIK the drivers only enable/use it in certain titles.

Have a read of this https://www.techspot.com/review/2234-nvidia-resizable-bar/

It's not working like it should be for all games it seems, and it negatively impacts some. So I wondered if once set up, can you now manually control it (on or off) via the program settings tab for each game in the Nvidia control panel? I'm guessing not as the techspot article is only a month old.

Having to turn it on and off in the mb bios will be a right pain in the arris.

 

[Kirby Wurm]

AFAIK the drivers only enable/use it in certain titles which benefit from it. You can also force it on via NVInspector.

I think Watchdog Legion has it enabled IIRC.

 

[ltron]

Have a read of this https://www.techspot.com/review/2234-nvidia-resizable-bar/

It's not working like it should be for all games it seems, and it negatively impacts some. So I wondered if once set up, can you now manually control it (on or off) via the program settings tab for each game in the Nvidia control panel? I'm guessing not as the techspot article is only a month old.

Having to turn it on and off in the mb bios will be a right pain in the arris.

As far as I'm aware the only reliable method is disabling 'Resizeable BAR' and 'Above 4G Decoding' in the BIOS. Otherwise you could try Nvidia Inspector to disable it for certain games, I'm wary of this method though as sometimes ReBar is causing performance issues for games not on the whitelist which means the whitelist is not working properly (see HWUnboxed's video).

 

[opethdisciple]

Nvidia turn it on and off depending on the game at the driver level. So there is no issues with you leaving it on.

In fact leaving it off means you are missing out in the games where it does make a positive effect.

 

[Hotwired]

Nvidia turn it on and off depending on the game at the driver level. So there is no issues with you leaving it on.

In fact leaving it off means you are missing out in the games where it does make a positive effect.

Nvidia has enabled it for games where it has a negative effect. Which is what the thread is about.

I had a look at the HWUnboxed review just now and Nvidia is not getting the gains AMDs version does and their filter to disable for negatively affected games is worse too: https://youtu.be/_f7X_hqPRhE?t=745

It's a few % to start with but questionable worth when the implementation isn't great.

 

[opethdisciple]

Nvidia has enabled it for games where it has a negative effect. Which is what the thread is about.

I had a look at the HWUnboxed review just now and Nvidia is not getting the gains AMDs version does and their filter to disable for negatively affected games is worse too: https://youtu.be/_f7X_hqPRhE?t=745

It's a few % to start with but questionable worth when the implementation isn't great.

I thought they said they turn it on and off per game at the driver level as they are aware that it can have a negative impact in some games.

Whether it makes more of a difference for AMD or not is a different conversation entirely.

"
In practice, the performance benefits of Resizable BAR can vary substantially from game to game. In our testing, we’ve found some titles benefit from a few percent, up to 12%. However, there are also titles that see a decrease in performance, so NVIDIA will be pre-testing titles and using game profiles to enable Resizable BAR only when it has a positive performance impact. That way you won’t have to worry about bugs or performance decreases, and won’t have to rely on the community to benchmark each title and discover whether Resizable BAR is beneficial in the games you’re playing.

"

Link

 

[Hotwired]

I thought they said they turn it on and off per game at the driver level as they are aware that it can have a negative impact in some games.

Whether it makes more of a difference for AMD or not is a different conversation entirely.

"
In practice, the performance benefits of Resizable BAR can vary substantially from game to game. In our testing, we’ve found some titles benefit from a few percent, up to 12%. However, there are also titles that see a decrease in performance, so NVIDIA will be pre-testing titles and using game profiles to enable Resizable BAR only when it has a positive performance impact. That way you won’t have to worry about bugs or performance decreases, and won’t have to rely on the community to benchmark each title and discover whether Resizable BAR is beneficial in the games you’re playing.

"

Link

Yes they said that. But I looked at the HWU video linked up the page, posted 2 weeks after Nvidia said that and this is what they saw their 3080 doing:

I found the one they did for a 6800 a while back and it looks like this:

Maybe there's an argument that neither of them are competently blocking the negatives but AMD is getting more out of it when it's beneficial.

 

[Grim5]

I've only tested it in Valhalla and my 4k fps improved from 63fps to 69fps

 

[IT Troll]

Watch Dogs Legion shows a small 3 fps improvement at 4K with resizable BAR enabled. At lower resolutions performance is worse. Sounds like Nvidia really need to profile based on resolution and game.