Does 4080 support Distributed Shared Memory？Thanks!!!
are you referring to shared memory in the new threadblock cluster capability?
yes…seems only in H100, which is avail until Jan next year, right?
Yes, that is a hopper feature. 4080 is not a Hopper GPU. It is a member of the Ada Lovelace family of GPUs. Hopper is compute capability 9.0 or 9.x. 4080 is a compute capability 8.9 device.
Seems even 4090 is not…So only H100 can?
Yes, Table 14: CUDA C++ Programming Guide