Apple failed to formally announce the memory bandwidth of your M1, but suggests the M1 Max is "nearly 6x the memory bandwidth of M1." This, in theory, places the M1 at around 66GB/s of peak memory bandwidth. Benchmarks which have surfaced seem to concur that the extra cores as well https://ricardohgebx.activoblog.com/28291016/fascination-about-ajmslot