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Revisiting DDR5-6400 vs. MRDIMM-8800 Performance With Intel Xeon 6 "Granite Rapids"
One of the exciting elements of Intel's Xeon 6 Granite Rapids launch last year was introducing support for MRDIMMs alongside DDR5-6400 memory support.
One year later, today is a fresh look at the DDR5-6400 vs. MRDIMM-8800 performance for Granite Rapids with new/updated benchmarks, the latest Linux software improvements, and also looking at the impact on power and thermals of MRDIMM memory. While this is a dual socket platform, for this round of testing only one of the Xeon 6980P processors was populated and the respective memory. With a single Intel Xeon 6980P processor I ran the same set of benchmarks using 12 x DDR5-6400 64GB DIMMs (Micron 64GB 2RX4 PC5-6400B-RA1-1211-XT) and then 12 x MRDIMM-8800 modules (MTC40F2046S1HC88XDY / PC5-8800X-HA0-1110-XT).
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