New processor launches are closely followed by clock-speed and benchmark records, and that applies to even AMD's Ryzen 5 1600X six-core processor. Professional overclocker Der8auer succeeded in overclocking the chip to 5905.64 MHz without having to disable any cores. The feat was possible due to liquid nitrogen (LN2) cooling. The clock was made possibly by running the chip with a base-clock of 129.79 MHz, and a multiplier of 45.5X. The core-voltage is unclear. The processor was paired with an ASUS Crosshair VI Hero motherboard, and G.Skill Trident Z memory.
Source: AMD Ryzen 5 1600X Overclocked to 5.90 GHz | techPowerUp