Good memories, but it's best to ensure they are compatible with the system you have. For me:
Motherboard: MSI B550 Tomahawk and processor: AMD Ryzen 7 3800XT cannot boot into Windows with XMP Profile.
I didn't investigate much, I made some manual adjustments but nothing worked. So now they run at 3200 with the settings of the 3200 MHz model (I should have chosen that one for my needs).
I imagined that I could do a basic OC (I'm not a crazy expert) if I got memory with a higher frequency, as I saw that some people, even with inferior systems, managed it easily without special settings.

I can say that it is a very good RAM, but for me, who bought a 3600 16 GB RAM, it crashes when I increase its speed to normal instead of 2123

Good memories without unnecessary things like LED and synchronization for colors, etc.
I activated OC at 3600 in the computer's BIOS and it worked with 2 modules but not with 4, but this has to do with the rest of the system and what it can handle.
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I have 4 of these, a total of 128GB, I never had and will never have a memory bottleneck.
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The positive thing is that they are quite cheap compared to other similar ones (other brands but same timings). The other ones that are identical but have LED are these:
https://tinyurl.com/3zuswwvn