Comment by mdp2021

> weights [as] part of the rom of the chip

Not really that: you are pointing to Compute-In-Memory (CIM) - techniques where the data (here, a multiplier value) is part of the processor (here, the multiplying circuit).

The problem of "fetch and process" is bypassed completely architecturally: the data is there where the processing happens - it's not moved, there is no latency.