There isn't any latency reduction on the M1, Apple use the exact same 4,266 MT/s LPDDR4X that can be found soldered onto the motherboards on a few window's lapt

There isn't any latency reduction on the M1, Apple use the exact same 4,266 MT/s LPDDR4X that can be found soldered onto the motherboards on a few window's laptops, and they are just using the stock timings. I think the main reason Apple are doing it is to simplify their motherboard PCB design and make the design more compact.