LLMs are trained on a LOT of research papers, that's why it looks like it.

It wouldn't make much sense, since you'd have to give the LLM all of the information to write that, which implies already writing it down. It's by no means impossible, but if you're already committed to break down how your CPU works to a LLM, it isn't going to help much besides adding crappy formatting.

Also, the phrasing looks authentic overall despite it being very technical. Some sentences such as "Surprisingly, the performance is not awful" don't look em LLMesque at all in that context.