Intel Xeon 6 Granite Rapids Memory Scaling Performance From 6 To 12 MRDIMMs
The WRF weather forecasting model software benefited greatly from making use of twelve MRDIMMs for significant time savings.
Those interested in even more reference data can find nearly 300 benchmarks in total I ran on this Gigabyte Xeon 6980P "Granite Rapids" server with 6, 8, 10, and 12 MRDIMM-8800 modules.
Whether going for all twelve MRDIMMs is necessary ultimately depends upon what workloads and also the size of the given workloads you'll be using. For many workloads tested, opting for six or eight MRDIMM-8800 modules can be sufficient even with the top-end 128 core Xeon 6980P processor as an option until memory prices subside. One configuration that wasn't effective at all for this server was the ten MRDIMM configuration at least when running in the default SNC3 mode it tended to provide little benefit over eight MRDIMMs and even some regressions.
Hopefully this reference data is useful if you or your organization have been contemplating running an Intel Xeon 6 Granite Rapids server not with all memory channels occupied with MRDIMMs given today's memory prices.
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