AMD’s Ryzen 5000 processors have a higher memory “sweet spot”, claims leaked slide

AMD’s memory speeds are linked to Ryzen’s Infinity Fabric Clock (fclk), memory controller clocks (uclk), a fact which makes faster DDR4 memory beneficial for AMD’s Ryzen architectures for several reasons. In the slide below, which comes via WCCFTECH, AMD claims that 4,000 MHz is the new 3,800 MHz, a fact which means that Ryzen 5,000 series users should be able to use faster DDR5 memory while maintaining a 1:1:1 relationship between Infinity Fabric, Memory Controller and Memory frequencies.

AMD’s Infinity Fabric Clock speed governs how fast AMD’s CPU cores can communicate across CPU dies and with Ryzen’s SOC controllers. This clock speed link allows faster memory speeds to enable faster, less latent inter-core communications for multi-die processors, such as the 12-core Ryzen 9 5900X and 16-core Ryzen 9 5950X, and more rapid communications with PCIe, SATA and USB devices. 

While the silicon lottery will always apply when it comes to the capabilities of a specific processor’s memory controller, AMD has designated 4,000MHz DDR4 memory as Ryzen’s new sweet spot. This change means that Ryzen users who are looking for the fastest possible performance should be looking for low latency 4,000MHz DDR4 memory kits for their Ryzen 5000 series processors.