Does CPU reduce memory effectiveness?

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Magicmix

Commendable
Mar 22, 2016
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So I have been doing a lot of research but have yet to really find the answer to this question

Lets say I have DDR4 2666 memory with 25ns latency, 14 GB/s write speed and 11.6gb/s transfer speed would a CPU that only supports 2133 memory frequesncy reduce the memory's effectiveness in those three categories? if so can someone explain how?
 
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SchizTech
Memory modules are rated for a certain speed they are designed for and tested at, while a CPU/MOBO may have a lower standard speed. Ordinarily in this case the system would run the memory at the lower supported speed. That is simply a default though: just like a default setting in the OS it can be changed. In this case going to the BIOS settings and enabling the X.M.P. profile will prompt the system to run the memory at the settings indicated in the chip that identifies the memory modules (the higher speed).
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SchizTech

SchizTech

Judicious
Jan 16, 2011
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Memory modules are rated for a certain speed they are designed for and tested at, while a CPU/MOBO may have a lower standard speed. Ordinarily in this case the system would run the memory at the lower supported speed. That is simply a default though: just like a default setting in the OS it can be changed. In this case going to the BIOS settings and enabling the X.M.P. profile will prompt the system to run the memory at the settings indicated in the chip that identifies the memory modules (the higher speed).
 
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