Overclocking
We managed to increase both CPUs to an all-core 4.1GHz by dialling voltage up to 1.40V. It is clear that the first batch of Ryzen chips, all cut from the same cloth, have an air-cooled ceiling of between 4.0-4.2GHz.
A nice little boost in performance is always welcome. Our long-term advice would be to dial the speed back to an all-core 4.0GHz and enjoy excellent performance for your buck.