Pascal Gilcher/Marty McFly RT Shader performance- Pascal vs Turing - Overclock.net - An Overclocking Community

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Pascal Gilcher/Marty McFly RT Shader performance- Pascal vs Turing

 
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post #1 of 2 (permalink) Old 10-16-2019, 10:24 AM - Thread Starter
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Pascal Gilcher/Marty McFly RT Shader performance- Pascal vs Turing

Has any testing been done, or can anyone speculate based on GPU specifications, what architecture runs the pascal gilcher/ Marty McFly Rt shader better, Pascal vs Turing?

Just for example, although the 1080ti's specifications versus the RTX 2080 include more cuda cores, more shading units, more memory bandwidth, among other things, the RTX 2080 is still slightly faster across the board, despite less raw compute power. Same comparison can be made between 1080 and 2070 as well.

Does the Pascal Gilcher benefit from any of the new technologies in Turing architecture, or is it's performance more about pure compute power?

I've been running the RT Shader for the last few days. Amazing, but the performance hit is BRUTUAL. I really wish there was a version of this that could utilize the RT cores.

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post #2 of 2 (permalink) Old 10-16-2019, 11:13 AM
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Quote: Originally Posted by CelticGamer View Post
I've been running the RT Shader for the last few days. Amazing, but the performance hit is BRUTUAL. I really wish there was a version of this that could utilize the RT cores.
The RT cores are very specifically used to accelerate traversal of a BVH, which contains geometry vertex information in a tree structure. Shaders interact with pixel buffers in a massively parallel manner. Shading would be slowed down a lot if it were somehow made to work with RT cores, except maybe in some additive way and not substituted. May be the author can construct own BVH from pixel buffers and feed that to the RT cores... ha!

Shading is fairly restrictive, as it cannot access geometry data and move itself about in the rendering pipeline (ENB has work around but at cost of performance). For example, the quintMXAO shader is fast and looks great, but it will bleed through any fog just like all AO shaders in ReShade.

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