In a dual-channel configuration, achieving 6400 MT/s is an incredible feat, particularly for four DDR5 RAM modules on an AM5 motherboard.
Kingston's 192 GB RAM kit breaks the barrier by achieving a solid 6400 MT/s speed with Ryzen 7 9800X3D
Someone just pushed the AM5 platform to its max limits (via @9550pro) in terms of the memory configuration and speed. AMD platforms usually struggle to achieve high memory frequencies, unlike high-end Intel LGA 1851 motherboards, which are breaking the 12000 MT/s speed barriers day after day.
While we aren't even close to that mark, it should be noted that achieving 12000 MT/s or even 1000 MT/s+ speed is incredibly difficult with multiple RAM modules. This is why the latest feat achieved by the 192 GB DDR5 RAM kit is impressive. As can be seen from the screenshot, an overclocker just maxed out the memory capacity the AMD Ryzen 7 9800X3D can support.
The motherboard used was the MSI MEG X870E GODLIKE and since the user installed 4x 48 GB UDIMM DDR5 RAM sticks from Kingston, the 2DPC 2R (2 DIMMs Per Channel, Dual Rank) configuration was enabled. By AMD's own recommendation, the Ryzen 7 9800X3D can achieve just 3600 MT/s in this configuration and the MEG X8870E GODLIKE can allow up to 4800 MT/s with overclocking.
The overclocker broke this mark and achieved a staggering 6400 MT/s speed. This is quite difficult to achieve since pushing dual-rank memory with DIMMs sharing the channels increases the electrical load and introduces signal integrity challenges such as signal reflections and interference. To solve these problems, one has to experiment with latency timings and various memory parameters from the BIOS.
As seen from the CPU-Z window, the CL timings were 48-48-48-103, which is satisfactory. It required the user to increase the voltage from 1.10V to 1.40V and, as per the RunMemtest Pro, the RAM kit was working satisfactorily with a low error rate. All in all, the setup looks fully stable and is ready for big workloads.
It should be noted that such results aren't possible with every X870/X870E motherboard and RAM kit. Moreover, 192 GB RAM capacity and 6400 MT/s may not be useful for most mainstream PC owners, but it shows how far the AM5 platform has come with respect to memory support.
About the author: Sarfraz Khan is a hardware reporter with a focus on PC components and the builder community. With years of experience writing about PC hardware and laptops, his work has been featured on several reputable technology publications. Sarfraz's hands-on experience is demonstrated through his first-person accounts of using and comparing different hardware configurations, providing practical and relatable insights for everyday users. His technical analysis is respected by peers in the enthusiast community and has been cited by specialized hardware sites such as Germany's Igor's Lab.
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