Does ddr4 RAM speed matter for gaming?

Related questions

1. Are SSDs more reliable than HDDs?
2. Do RAM timings need to be the same?
3. Can I use 2133 and 2400 Ram together?
4. Do SSDs last longer than HDDs?
5. Is a SSD worth it for gaming?
6. Why are SSD still so expensive?
7. What is the difference between ddr3l and ddr4?
8. How does a SRAM work?
9. Is 8gb RAM sufficient?
10. Which is better SSD or HDD for gaming?

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20. #technically
21. #additional
22. #actual
23. #800mhz