Recommend a fast GTX for Cycles (faster loading)

Which graphics card would you recommend for fastest building (loading) time in Cycles and also for fast rendering?

I have 1080ti+1070, but I’m not satisfied with the building/loading time of my scenes. Too slow.

The loading time is probably better on new cards and boards. Some cards like the Nvidia Quadra & Titan have higher loading times, but it depend to what board you use. Else its mostly the software and how it prepares the information. For example, many textures need to get converted to a different format before uploaded. Redshift has the option to load the GPU texture format as proxy, so converting is faster. Same for Proxy Mesh.
Well upload is also the main disadvantage of GPU. Using Instances helps too.

Does the 2080Ti have faster building time in Cycles renderer?