http://wccftech.com/amd-ryzen-5-1600x-cpus-8-working-cores-spotted-wild/

A number of users have reported purchasing Ryzen 5 1600X & 1600 CPUs that had 8 cores active right out of the box. The reports surfaced over the past couple of days on the Korean cooln.kr forums, special thanks go out to Bong for the tip!