RAMing speed: Does boosting DDR4 to 3200MHz improve overall performance?

As DDR4 goes mainstream, end users want to know if they can expect to see performance gains from adopting it. Does pushing DDR4 all the way to 3.2GHz yield significant improvement over DDR3?
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The best I could do atm with 4x16GB DDR4 RAM and 5800X, help to

RAMing speed: Does boosting DDR4 to 3200MHz improve overall

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