Cycles: One RTX 2080 ti or two 2070 super?

I’m thinking about upgrade my current GPU workhorses, GTX 1080 ti + GTX 1070. For Cycles rendering, is two RTX 2070 supper better than one RTX 2080 ti? My works don’t deal with massive polygons in the scene.

Data from Blender benchmark:

Median result without filters:
GeForce RTX 2070 SUPER: 156.1355
GeForce RTX 2080 Ti: 108.579

GeForce RTX 2070 SUPER: 91.85255
GeForce RTX 2080 Ti: 73.71435

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According to these data, RTX 2070 Super is almost twice as fast GTX 1080 ti. RTX 2080 ti is only about 20% faster than GTX 2070 Super…? If the data is accurate, then it looks like two GTX 2070 Super is the way to go.


Optix doesn’t support AO? That’s a deal breaker.

2070 super supports nvlink - so vram will sum up

Ao for optix sooner or leater will be supported

You can bake an AO map or save AO into vertex colors at least. No bevel shader is a bit more problematic in my opinion.

I don’t think it’s a trivial fix and it’s on nVidia to support these features, afaik.

I’m a bit confused about Optix AO. The blender dev link above is about Optix denoiser with GTX 10 series.

Rendering time for rendering passes, including AO is more important to me than optix denoiser. So RTX 20 series do support AO render pass in Opitx mode?

Optix is currently supported for GTX cards and you can test it yourself with latest 2.90 buildbot builds:

This supports the same features on both GTX and RTX cards, happens that you won’t get much better rendering time with GTX cards using Optix.
What is currently not supported is Ambient Occlusion and Bevel nodes added from Shader Editor.

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