Apple failed to officially announce the memory bandwidth on the M1, but states the M1 Max is "nearly 6x the memory bandwidth of M1." This, in theory, places the M1 at close to 66GB/s of peak memory bandwidth. There isn't a Boot Camp for Macs with Apple silicon chips, and https://ajm1max21862.ziblogs.com/28229505/ajmslot-an-overview