Question RAM upgrade 2x16Gb 3200Mhz CL20 vs 2x16Gb 2666Mhz CL15 ?

Sep 18, 2019
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I am going to upgrade laptop with 2x16Gb where I it is possible set XMP 3000Mhz.
I would like to know which is beter in terms of speed of appications for coding, running IDE, machine learning, password cracking and sometimes video encoding.

I found :
a) HyperX 2x16GB 2666MHz Impact Black CL15 1.2V
b) HyperX 2x16GB 3200MHz Impact Black CL20 1.2V

  1. Which will be faster in those applications especially if one has CL15 and other CL20?
  2. Is it worth to pay like 20-30% more for 3200Mhz?
  3. Is it possible to run 3200MHz if producer gives 3000MHz XMP? Some screenshots of bios parameters in the link: https://forums.tomshardware.com/threads/ram-2666-overclocking-to-3000-xmp-with-clevo-sager-pb51rf-g.3526219/
 

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