AMD already announced Threadripper 1950x not compatible with Windows 7, but it was (until they updated the BIOS to receive the TR 2000).
So, did someone try to install and run Windows 7 + X470 or…

Despite what AMD says in drivers, did s.o. test Ryzen 3000+Windows 7

Source: [H]ardOCP – Despite what AMD says in drivers, did s.o. test Ryzen 3000+Windows 7