Hardware.Info compared 28 DDR4 memory kits for Coffee Lake and Ryzen
A quote from the article:
For a long time, memory was one of the most boring components of a PC: you just had to have as much of it as possible; the specific type and speed were of little importance. Now those strips of RAM are suddenly one of the most talked-about parts. It's time for a thorough test.28 DDR4 memory kits comparison test: the best memory for Coffee Lake and Ryzen
Compared to ddr3, the clock speeds of the memory increased. 2133 MHz is the minimum speed for DDR4 and in practice we see modules with much higher clock frequencies. Although the performance gain is partly offset by higher latencies, the new generation is still a little faster all things considered. Especially for laptops, the lower operating voltage is also an advantage, which results in a more economical operation.