I bought a Ryzen3700x and was wondering if the version that you get with the CPU comes with the side quest "Way of the Berserker"
The promotional copy of the game you receive if purchasing an eligible CPU (such as your Ryzen 7 3700X) is the Standard Edition, and I don't believe it is treated as a preorder. Having looked into it further, I haven't found any information about the preorder bonus being included, so I would advise consulting AMD directly to see if that is something they were including as part of the product or not.

I hope that you've been enjoying the game, if you already started playing!