NVIDIA Resizable Bar?

MelissaGT

Does anybody know if NVIDIA's Resizable Bar is something that works/will work/has been approved to work with Daz Studio? I've enabled it and I might be crazy, but it feels like I'm getting performance loss on my older MMO's...but if it legit helps Daz/Iray I'll keep it enabled. 

Richard Haseltine

This appears to be related to manging data transfer across the PCI lanes - if so it isn't likely to havea  tremendous impact, certainly for rendering, as the scene data is transferred once at the beginning of the render and then worked on (space permitting) in the GPU memory. If it takes up extra GPU memory for its own working it might well have a negative impact. It might, subject to that caveat, have a noticeable impact on how quickly the preview updated if using Iray drawstyle to navigate the scene during set up.

TheMysteryIsThePoint

I was under the impression that resizable BAR support was only significant for out-of-core rendering when textures are shuffled across the PCI bus during rendering. Not really significant if the scene fits in GPU memory. I could be, and probably am, wrong.

MelissaGT

TheMysteryIsThePoint said:

I was under the impression that resizable BAR support was only significant for out-of-core rendering when textures are shuffled across the PCI bus during rendering. Not really significant if the scene fits in GPU memory. I could be, and probably am, wrong.

I was thinking more along the lines of scene set-up and navigation, and flipping between texture shaded and Iray preview.  

magog_a4eb71ab

melissastjames said:

TheMysteryIsThePoint said:

I was under the impression that resizable BAR support was only significant for out-of-core rendering when textures are shuffled across the PCI bus during rendering. Not really significant if the scene fits in GPU memory. I could be, and probably am, wrong.

I was thinking more along the lines of scene set-up and navigation, and flipping between texture shaded and Iray preview.  

No, resizable bar wouldn't make a noticeable difference as its intended to alleviate the stuttering experienced in some games and give a slight boost to FPS.

 

In technical terms, resizable BAR is a PCI Express interface technology that can boost the frame rate performance of select games by granting the CPU access to the entire frame buffer.
How does this work? It essentially makes the relationship between the CPU and GPU more efficient by removing the 256MB block read limit. With this cap removed, your system will be able to handle multiple video memory requests simultaneously and prevent a queue from forming.
This is especially important for loading up complex gaming worlds that require lots of GPU memory (VRAM) transfers for the likes of textures, shaders and geometry.
Nvidia claims that Resizable Bar (when used with an RTX 3080) can improve the frame rate performance by up to 11.9% with no compromises.
The sticking point is that you’ll need certain hardware in order to activate it, and only a handful of games actually support the technology.

You can read the full article, which I recommend, on Trusted Reviews: https://www.trustedreviews.com/news/what-is-resizable-bar-4150689 ; that gives a list of current games that support it.

 

MelissaGT

magog_a4eb71ab said:

melissastjames said:

TheMysteryIsThePoint said:

I was under the impression that resizable BAR support was only significant for out-of-core rendering when textures are shuffled across the PCI bus during rendering. Not really significant if the scene fits in GPU memory. I could be, and probably am, wrong.

I was thinking more along the lines of scene set-up and navigation, and flipping between texture shaded and Iray preview.  

No, resizable bar wouldn't make a noticeable difference as its intended to alleviate the stuttering experienced in some games and give a slight boost to FPS.

 

In technical terms, resizable BAR is a PCI Express interface technology that can boost the frame rate performance of select games by granting the CPU access to the entire frame buffer.
How does this work? It essentially makes the relationship between the CPU and GPU more efficient by removing the 256MB block read limit. With this cap removed, your system will be able to handle multiple video memory requests simultaneously and prevent a queue from forming.
This is especially important for loading up complex gaming worlds that require lots of GPU memory (VRAM) transfers for the likes of textures, shaders and geometry.
Nvidia claims that Resizable Bar (when used with an RTX 3080) can improve the frame rate performance by up to 11.9% with no compromises.
The sticking point is that you’ll need certain hardware in order to activate it, and only a handful of games actually support the technology.

You can read the full article, which I recommend, on Trusted Reviews: https://www.trustedreviews.com/news/what-is-resizable-bar-4150689 ; that gives a list of current games that support it.

 

I ended up disabling it as I was indeed suffering a performance loss on my older games. That and the GPU was getting hotter. Playing Star Wars: The Old Republic last night and GPU was hitting 75C. Disable Resizable Bar and GPU topped at 57C back in-game. Big difference. Not sure why people are even bothering with it.  

magog_a4eb71ab

melissastjames said:

I ended up disabling it as I was indeed suffering a performance loss on my older games. That and the GPU was getting hotter. Playing Star Wars: The Old Republic last night and GPU was hitting 75C. Disable Resizable Bar and GPU topped at 57C back in-game. Big difference. Not sure why people are even bothering with it.  

Its more for those who are having issues with certain games; especially those who are trying to do "redline" gaming where they're attempting to max out their FPS as high as possible with overclocks, etc. The good thing is you don't need it, but will at least have the option available if you ever want to play a game that supports it.