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cyberstorm64dd
Challenger

Tessellation Effects and MLAA missing on RX6750XT works on ATi HD5870

I am noticing that tessellation and MLAA are not working on my new GPU in places there they worked on my old GPU. Some demos that exclusively require it give me an error saying that I do not have the feature at all. They are distractingly not visible. Or to put it in a way you can understand: Tessellation enabled, MLAA Enabled, but don’t work. This does not apply for some games, because they aren’t actually doing the tessellation effect, it’s just a higher LOD. 

MLAA works on my HD5870, and my RX560X.

it does not work on my RX6750XT 

 

(Real-time) Hardware Tessellation works on my HD5870 and RX560X. It does not work on my RX 6750 XT

comparison screenshots can not be provided as my laptop is not with me, and my HD5870 is broken in a way that damages other components of my PC. 

Current PC Specs: Dell precision, T7500 full tower workstation. 

CPU: iNTEL Xeon X5660 x2 (second processor is on a custom riser board)

RAM: 96GB DDR3

C Drive: Samsung 870 QVO SATA SSD

GPU: RX6750XT (Navi 22)

 

is there a program that can be used to test if features are properly working or not that is easy to use and understand? Most programs I can think of don’t work, or might just use the CPU/other parts of the GPU to do the effect. I 

Cyberstorm64 of UNYU
Tessellation Enjoyer.
1 Solution
cyberstorm64dd
Challenger

NOT SOLUTION, But contains important information. 

MLAA and TESSELATION are BROKEN in the latest generations of AMD cards on the latest drivers. Other effects like local reflections for image-based rendering also seem to be broken in some way or other. |

MLAA DOES NOT WORK ON RDNA BASED GRAPHICS CARDS. (It works on GCN however) 
Automatic Tesselation is broken and framerate takes a larger than expected hit on RDNA based GPUs. 
Some Shading effects also seem to be broken, polygons inside of shape seem to be highlighted for no reason whatsoever. 

These issues do not exist on GCN cards or are less severe. 

Put simply, if you want your older games to look correct use GCN, or TerraScale. If you want DX12 Ultimate use RDNA3. 

Cyberstorm64 of UNYU
Tessellation Enjoyer.

View solution in original post

12 Replies

I did that, the games that have the problem still have the problem, even after a drivers reset. 

and I am talking about real tessellation, where it fills in geometry data based on existing geometry data. Not the fake hight map displacement stuff or additional LODs/high resolution terrain. Curves in Need for Speed Hot pursuit (both versions) and other things are jagged and blocky. Not like “pixelated” it’s just “simplified” looking. The game is designed for tessellation. On my other GPUs the curves in the road are curved instead of being blocky. 

 

As an example, on all my GPUs that I have run valheim on, the tessellation on not only tessellated (added more geometry details) the ground, but also the giant rocks too on when enabled on my systems that are not my RX6750XT. 

 

MLAA is also enabled and not working. 

Cyberstorm64 of UNYU
Tessellation Enjoyer.

(The lack of working geometry tessellation is misssing in every game I have.) it’s also distractingly noticeable. 

Cyberstorm64 of UNYU
Tessellation Enjoyer.

for clarity, I am talking about automatic subdivision 

Cyberstorm64 of UNYU
Tessellation Enjoyer.

MLAA does not work on my RDNA 3 card either. All these things worked fine on my GCN and Terrascale 2 GPUs

Cyberstorm64 of UNYU
Tessellation Enjoyer.

Tessellation is working on RDNA 3 but not as well as it worked on GCN cards. Performance loss is incredibly significant when using Tessellation on RDNA based GPUs. 

Cyberstorm64 of UNYU
Tessellation Enjoyer.
cyberstorm64dd
Challenger

NOT SOLUTION, But contains important information. 

MLAA and TESSELATION are BROKEN in the latest generations of AMD cards on the latest drivers. Other effects like local reflections for image-based rendering also seem to be broken in some way or other. |

MLAA DOES NOT WORK ON RDNA BASED GRAPHICS CARDS. (It works on GCN however) 
Automatic Tesselation is broken and framerate takes a larger than expected hit on RDNA based GPUs. 
Some Shading effects also seem to be broken, polygons inside of shape seem to be highlighted for no reason whatsoever. 

These issues do not exist on GCN cards or are less severe. 

Put simply, if you want your older games to look correct use GCN, or TerraScale. If you want DX12 Ultimate use RDNA3. 

Cyberstorm64 of UNYU
Tessellation Enjoyer.

Been having the exact same problem, did you find a solution ? Or are we gonna have to wait for AND to do something about it ?

Tesselation seems to be "Fixed" on RDNA3. MLAA still broken on all AMD generations.

Also dGPU on laptops with dGPU is now only showing generic stand-ins for its "engines" in task manager, where they all showed correctly before drivers 24.1.1

Cyberstorm64 of UNYU
Tessellation Enjoyer.
olgabotezatu
Adept I

 

The most common cause for missing features is outdated or faulty drivers. Make sure you have the latest drivers downloaded and installed from AMD's official website for your specific RX 6750XT model. You can find them here: https://www.amd.com/en/support

 

on the same driver versions, verified functional and complete, the MLAA feature works on GCN but not on RDNA. Tessellation was specific to the games in relation to the hardware and not the drivers I think.

Cyberstorm64 of UNYU
Tessellation Enjoyer.
ritayong
Adept I

Hi, thanks for the solution it helps me too.

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