TL;DW
This kit has 5000MHz CL18 as an XMP profile that's 100% stable for daily usage.
It's a prototype? Pre-production sample? Not confirmed.
Its Micron E-Die.
While Micron claims their E-Die is rated up to 1.5V this kit with XMP enabled runs at 1.55V.
This is quite insane kit if you ask me.
I still haven't got into overclocking my RAM as its a very time consuming endeavour but this makes me excited because I have 4 sticks of Micron E-Die that run in quad rank configuration.
I only did a really dirty OC in the past to 3600MHz CL14 just to see if I boot and I not only did boot but it also passed the quick Aida64 memory performance benchmark where I scored over 60,000MB/s on Copy speeda which is almost exactly as much as Der8auer got with his 5000MHz kit.
But he got quite a substantial performance penalty since he can't run that in 1:1 mode.
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These are sticks made by Gigabyte
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on Ryzen, likely most 3rd Geb CPUs can run it since all of them seem to handle 4GHz+ with ease
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On Intel many high speed kits are tied to specific motherboards and will likely not work on other ones. Also you need CPU with binned IMC.
On Ryzen 3rd gen its different. Just check the X570 RAM compatibility list QVL on any brand... you will find many high speed kits that are supported out of the box.