Apple didn't officially announce the memory bandwidth from the M1, but suggests the M1 Max is "practically 6x the memory bandwidth of M1." This, in idea, puts the M1 at all over 66GB/s of peak memory bandwidth. Classic Intel-centered Macs used various chips for your CPU, GPU, I/O, and safety, https://marcoffczw.blogdiloz.com/27652899/examine-this-report-on-ajm1max