Some lecture 😉
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2133 is the memory frequency Intel rated fir that platform. You can go much higher than this just by enbabling xmp profile (which will overclock the ram for you at the specs the manufacturer tested and validated the kit... Read it... The kit)
You can also manually overclock you sticks. If you have a kit you should easily bump it some hundreds megahertz above the xmp profile BUT if you mix sticks problems will potentially arise, and the more speedy your ram the more it is true as the article I linked above perfectly explain.
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