Will get one as soon as you post your computer Information as per AMD Forum rules: INFORMATION REQUIRED WHEN POSTING A QUESTION .
Needed to translate "Funktoniert " which came out as "is working". So are you trying to find out what Corsair RAM MEMORY Module is compatible with the Ryzen 7 2700x?
Need to go to the Motherboard's manufacturer Support site. Input your Motherboard Model at Support and click on Drivers and Software or on CPU/MEMORY Compatibility.
If you post your Motherboard MAKE & MODEL and exact MAKE & MODEL of your Corsair RAM MEMORY, I will gladly link the proper QVL RAM MEMORY list for your Ryzen and Motherboard.