AMD GPU selection

[siluro818]

Have you considered the remote possibility that it's not NVIDIA that hasn't optimized their driver, but rather it's AMD that may have a problem here? 20% performance uplift from BAR alone is not normal. Some minor improvements in lows is more like it should behave.

Functionally, it's the exact same thing. SAM is just a marketing name and I'm perfectly willing to die on this hill, it's a feature which isn't going to bring groundbreaking performance improvements: or at least shouldn't. Unless you're Intel and never had a driver code base that took traditional BAR segmentation into account.

I'd consider it if AMD cards ended up having lower framerates than Nvidia's without ReBAR in those titles, but that isn't the case.
It tends to be engines that have Radeon performing already on par with GeForce GPUs which allow for extra FPS.
Ultimately how much of a performance uplift one gains from that feature depends on the game engine. Unless you can get a developer of such engine to confirm that "it shouldn't" do so in their game your assumption is just a random and unfounded thought...

 

[DemonicRyzen666]

I'd consider it if AMD cards ended up having lower framerates than Nvidia's without ReBAR in those titles, but that isn't the case.
It tends to be engines that have Radeon performing already on par with GeForce GPUs which allow for extra FPS.
Ultimately how much of a performance uplift one gains from that feature depends on the game engine. Unless you can get a developer of such engine to confirm that "it shouldn't" do so in their game your assumption is just a random and unfounded thought...

you're most likely seeing what having a real hardware schedular inside a gpu can do with rebar.

 

[Dr. Dro]

you're most likely seeing what having a real hardware schedular in a gpu can do with rebar.

AMD drivers do not support hardware-accelerated graphics scheduling. This is forced-off on all AMD GPUs including RX 7900 XTX, you can check it in dxdiag > save all information if you don't believe me. HAGS coupled with ReBAR is supported only on NVIDIA configurations and having HAGS enabled is required to meet DLSS 3 system requirements.

I'll maintain that it's more than likely a driver optimization issue for AMD. They've placed great emphasis on marketing ReBAR for a reason.

 

[DemonicRyzen666]

AMD drivers do not support hardware-accelerated graphics scheduling. This is forced-off on all AMD GPUs including RX 7900 XTX, you can check it in dxdiag > save all information if you don't believe me. HAGS coupled with ReBAR is supported only on NVIDIA configurations and having HAGS enabled is required to meet DLSS 3 system requirements.

I'll maintain that it's more than likely a driver optimization issue for AMD. They've placed great emphasis on marketing ReBAR for a reason.

I wasn't talking about Hardware scheduling in windows I was talking about ON DIE.

 

[sLowEnd]

Resizable BAR is not a one-stop-shop fix for anything, so enabling "SAM" is not going to make a card that can't run things at 165 fps magically do so. Both it and HAGS were hyped to an extreme and neither are in the least bit important. AMD still doesn't support HAGS, so you have an idea.

Speaking of hyped up features...anybody remember Sideport? lol
The way some people were hyping it up for the 4870X2 was nuts.

 

[DemonicRyzen666]

Speaking of hyped up features...anybody remember Sideport? lol
The way some people were hyping it up for the 4870X2 was nuts.

AMD Adrenalin May 2023 Preview | Hardware Accelerated GPU Scheduling! - YouTube

Hardware Accelerated GPU Scheduling will probably come out the next drivers.

 

[Dr. Dro]

Speaking of hyped up features...anybody remember Sideport? lol
The way some people were hyping it up for the 4870X2 was nuts.

That's a trip down memory lane alright

Ultimately, that is what repeatedly happens; overhype, overpromise, underdeliver. That consistent track record paves the way for Intel and Nvidia to underpromise, overdeliver and take home all the credit, after all, the bar was being set by AMD all along. I blame their overambitious marketing.

I wasn't talking about Hardware scheduling in windows I was talking about ON DIE.

We are going OT, the OP's issue was resolved and their decision made. I actually wrote the answer to this, but I will leave it under a collapsible spoiler and you are welcome to DM if you want to discuss this any further.

Spoiler

The hardware command processor is not exactly an AMD world-exclusive. More often than not, it ends up detrimental to the experience. The Fermi architecture initially scheduled DirectX 11 draw calls using a hardware command processor, but this was disabled and replaced by their much faster software implementation, which scales to N threads. The downside is that it increases CPU requirements, but have you seen the kinds of CPUs we have today? On the other side, AMD has never supported Driver Command Lists because it was considered an optional by Microsoft. Curiously, Intel, who also doesn't support it (at least as far as Xe architecture), published a paper on it some time ago:

Game Development

Access tools, tutorials libraries, and code samples from Intel to optimize your games.

www.intel.com

I'm unsure of the impact of the transition to the new DirectX on PAL UMD (that was first made public with last year's May technology preview driver) exclusive to RDNA 2 (and now applicable to 3), but I'm fairly sure DX11 still operates strictly in an immediate context on AMD GPUs. None of this has any bearing in DX12, Vulkan or OpenGL, in fact, the recent OpenGL UMD rewrite (which was my top requested feature for years as a beta tester and one I am tremendously grateful to them was finally implemented) was also built on top of the PAL system as well, read more here:

GitHub - GPUOpen-Drivers/pal: Platform Abstraction Library

Platform Abstraction Library. Contribute to GPUOpen-Drivers/pal development by creating an account on GitHub.

github.com

GPU-Z will tell you if this is a supported feature, actually, I would be interested in knowing if modern AMD hardware supports Command Lists at all, the last hardware I had was Radeon VII and it did not support it. Mobile Vega (Cezanne) is identical in ISA, and doesn't support it either. If you could tell me if it does, I would be quite grateful. Here's the tab you need to look at:

Neither of these actually have any relation to HAGS, however, which is an entirely different thing (API-agnostic, and handles context switching, task management, etc.)

AMD Adrenalin May 2023 Preview | Hardware Accelerated GPU Scheduling! - YouTube

Hardware Accelerated GPU Scheduling will probably come out the next drivers.

It would certainly be interesting. Support for this is very late, and I know a certain bloke who would very much have his years-long running gag ruined by it @spajdrEX, finally HAGS support?