With 160GB, surely they can add more channels to compensate?

Is there anything preventing them from using heterogeneous memory chips, like 1/4 GDDR7 and 3/4 LPDDR? It could enable new MEO-like architectures with finer-grained performance tuning for long contexts.

You'd have to burn more die space for the duplicate but different ram controller logic and cache trees, I bet.

If the internal bus architecture is anything similar to QPI, getting the 'different' parts to communicate reliably is probably also a pain.

Rumor has it (according to MLID, so no one knows whether it's accurate) that AMD is also looking to use regular LPDDR memory for some of it's lower end next gen GPUs to not have to contend with nvidia over limited and cartelled GDDR7 supply. Maybe they're going to increase parallel bandwidth to compensate it? Or have wholly different tricks up their sleeve.

probably just a lot more of it, to capture that consumer ai market