You actually have no clue what you are talking about do you, it's just text drivel.
Tell us oh all knowing one, what effect does a few B450 boards coming with a 256Mbit SPI flash have anything to do with fan speeds on an X570 board?
He just posted that it was 1000 headaches to flash a b450 with a new Bios...
Took me 30 seconds for my incoming 3700x