Rumour has it that it's been fixed, and only affects early versions - http://techreport.com/news/32459/amd-ships-revised-ryzen-cpus-with-a-compile-bug-fix http:

Rumour has it that it's been fixed, and only affects early versions - http://techreport.com/news/32459/amd-ships-revised-ryzen-cpus-with-a-compile-bug-fix http://techreport.com/news/32459/amd-ships-revised-ryzen-cpu... It's hard to get official word though.