>>106482697
>okay so design it to allow 20gb using 10x 2gb? No?
The GPU chip needs a 320-bit memory bus for that 10x 2GB configuration.
Even the 5080 doesn't have that much bus width.
The memory bus is a physical interface in the GPU.

The goal of every GPU designer is to sell the smallest possible chip, you cut down on memory bus width to achieve that.
AMD has similar plans with their next set of GPUs according to >>106475685