Physics is hard. In the cycle of a 2400MHz DDR4 clock, a photon travels 12.5cm. The memory bus distance is on a similar order of magnitude. Main memory laten

Physics is hard. In the cycle of a 2400MHz DDR4 clock, a photon travels 12.5cm. The memory bus distance is on a similar order of magnitude. Main memory latency will be the big performance bottleneck for the foreseeable future.