Ohh, I have 2700X too. Tell me please, once you swap it, what you did. Most folks say there is no need to reinstall windows. Just upgrade BIOS, uninstall chipset drivers, swap cpu, fire up the pc and install chipset drivers. But some suggest its better to make a fresh install.
My 3900X is supposed to arrive in early September. I kinda envy those in better supplied countries.