Question What is the latency of RAM (DIMM) and PCIe?

Dec 12, 2018
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What I want to know is approximately the amount of latency induced by PCIe and by RAM? I want the latency from the CPU to the DIMM slot and to the PCIe slot (so no round-trip latency).
 
Dec 12, 2018
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https://www.crucial.com/usa/en/memory-performance-speed-latency

AIDA64 is a good memory latency benchmark:
https://techreport.com/review/34192/intel-core-i9-9900k-cpu-reviewed/2


Have to ask... what's the purpose of this question? (What are you trying to accomplish)
I was just curious.
Also, are those memory latency from the CPU and back or are they just CPU to RAM? (This is because I found it is about 100ns (in 2010) to access the DRAM (so CPU to memory) (https://stackoverflow.com/questions/4087280/approximate-cost-to-access-various-caches-and-main-memory)).
Also, by any chance, do you know the approximate latency of PCIe?
 
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