This message was posted on behalf of Intel Corporation
From the information you've provided, we can see that your Intel SSD 600p Series is behaving as expected. You're even getting a faster write speed than what we advertise for your model. We designed these drives around the inbox NMVe* driver in order to make it simpler to use and install.
I will move this thread to the Intel® NUC community, as they may be the ones who can provide a greater input and better suggestions for your issue.
I understand you have posted on a different thread and it seemed you have found the problem. I thank you for sharing details about it.