Rate, CAS, TRCD, TRP, TRAS. At the same working frequency of 2200MHz, the delay of DDR4 generation can be set smaller, and the performance is definitely higher than DDR3. In addition, the memory of DDR4 generation is more advanced than that of DDR3 generation, and the fever is lower than that of DDR3 generation. It is worth mentioning that in the whole machine, the better the performance of the memory, the better. Because the whole machine also has the data exchange bandwidth of various accessories, such as the front-end bus. If the front-end bus is 1800MHz, then only 800MHz dual-channel memory or 1600MHz single-channel memory is enough, and the memory higher than this cannot give full play to its performance. This is also the reason why Inter Milan abandoned the FSB bus and adopted the higher-speed QPI bus in the new Nehalem architecture.