ECC DDR5-4800 vs. DDR5-5200 Memory Performance For AMD Ryzen Zen 4
Those wishing to see all 120 benchmarks I ran in full for this memory performance comparison can find them via this result page.
On average across the 120 benchmarks the DDR5-5200 vs. DDR5-4800 performance advantage was around 2% overall. However, in a number of real-world workloads like OpenFOAM CFD, Incompact3D, Llamafile, Llama.cpp, and others the improvement with these faster ECC UDIMMs on the AMD Ryzen Zen 4 server was in the 4~6% range. Long story short if running memory-intensive workloads on AMD Ryzen 7000 series budget servers, the faster memory can be worthwhile assuming you aren't challenged by any availability issues in finding the faster memory modules. As of writing the KSM56E46BD8KM-32HA DDR5-5600 DIMMs I've been testing with can be found in-stock at Amazon.com (affiliate link) for around $120 USD per 32GB DIMM.
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