TechPowerUp posted a review on the New DDR4 Record on AMD Ryzen Platform: DDR4-4079.2 MHz
A quote from the article:
A new DDR4 overclocking record was achieved by Australian overclocker "newlife", breathing new life towards Ryzen's memory frequency support. Don't just count your fireworks right now, though: while impressive the result came with some caveats in the form of the user's Ryzen 5 1400 CPU: it was down-locked to a paltry, performance-murdering 800 MHz.New DDR4 Record on AMD Ryzen Platform: DDR4-4079.2 MHz @ TechPowerUp
After shipping with what could be considered by some as broken DDR4 memory support, AMD's Ryzen platform has in the meantime received the proper amount of care such a pivoting product for AMD should. A series of AGESA updates which improved AMD's performance in gaming, as well as DDR4 memory support have been under distribution since the platform's launch, and those updates have surely worked towards achieving this record today. The score was achieved with a single 8 GB G.Skill Trident Z E-die memory kit, which is usually rated for 3600 MHz frequencies (F4-3600C17-4GTZ), using 18-20-20-58-93-1 timings. This module was seated on a GIGABYTE AORUS AX370-Gaming K7 motherboard (F4 BIOS).