Cycles much worse performance with RTX cards

After upgrading from a GTX 1060 to RTX 2060, the performance of the Rendered preview and Progressive refine also got much worse.

Progressive refine:

Geforce GTX 1060 6GB - 5:33
Geforce RTX 2060 6GB - 7:11

Tiled rendering:

Geforce RTX 2060 6GB - 6:30

Render times are in minutes.

I was expecting about roughly twice the performance increase like in OctaneBench without the benefit of the RT Cores.

Tiled rendering:

Geforce RTX 2060 6GB - 6:30

With progressive refine my “old” GTX 1060 is way faster than my RTX 2060. This is clearly abnormal.

I do not think it’s so abnormal …
the rtx have an internal restructuring of their way of functioning compared to the old gpus … and without a rewriting of the code so that exploit their new features and optimizations, it makes sense that we have even worse perofrmance in some cases …

having said that, it would be interesting to understand if the problem of these lower performances is due to cuda or cycles …

I was wrong because I thought supported the new generation cards means we gonna get at least the same performance without the benefit of the RT cores. But clearly see there is lot more under the hood. I hope so it will be fixed soon.