[Scene_Cast2]

I'd guess that the datacenter "GPUs" lack all the fixed-function graphics hardware (texture samplers, etc) that's still there in modern consumer GPUs.

[jsheard]

They do still have texture units since sampling 2D and 3D grids is a useful primitive for all sorts of compute, but some other stuff is stripped back. They don't have raytracing or video encoding units for example.