AMD EPYC 9755 DDR5-4800 vs. DDR5-6000 Memory Performance

Ultimately it comes down heavily to what workloads your AMD EPYC servers utilize for how much benefit DDR5-6000 (or DDR5-6400) memory can have over DDR5-4800. In some cases like CI/CD build boxes and other workloads favoring high core counts but not so memory bandwidth intensive, sticking to DDR5-4800 can make sense if you are upgrading an existing AMD EPYC 9004 series server where that was the maximum memory speed at the time or trying to lower server costs given the broader availability of DDR5-4800 modules. But for HPC, AI, and other memory bandwidth intensive workloads, it definitely makes sense getting DDR5-6000/DDR5-6400 memory.

That side-by-side is for the workloads where there was a measurable difference for this 128-core Zen 5 classic core processor. Hopefully this data helps in quantifying the impact of DDR5-4800 vs. DDR5-6000 memory on AMD 5th Gen EPYC. Those wanting to see more of this DDR5-4800 vs. DDR5-6000 memory performance data on the AMD EPYC 9755 single socket server configuration can see this result file for all of my collected data across 200+ benchmarks. For some workloads going for AMD EPYC Turin with DDR5-4800 is still a definite win with minimal performance loss while for other memory intensive workloads it makes sense going for DDR5-6000/DDR5-6400 to fully leverage the capabilities provided by the new AMD EPYC Zen 5 processors.