A new technical paper, “Performance and Energy Benefits of MRDIMMs,” was published by researchers at Barcelona Supercomputing Center, Universitat Politecnica de Catalunya, Micron and Intel Corporation.
Abstract
“Multiplexed Rank DIMMs (MRDIMMs) have recently emerged as memory devices that enable higher bandwidth without increasing DRAM chip frequencies. This paper presents a detailed performance, power and energy evaluation of a production server with high-end MRDIMM main memory. The memory system upgrade from conventional registered DIMMs (RDIMMs) to MRDIMMs extends the bandwidth by 41% yielding 27-41% higher performance for bandwidth-bound workloads. Additionally, the latency improvement reaches hundreds of nanoseconds, benefiting a broad class of workloads sensitive to memory latency. At the same bandwidth utilization levels, RDIMMs and MRDIMMs exhibit similar power consumption. In the MRDIMM-extended bandwidth region, the performance improvements largely exceed the power increase, delivering up to 30% server energy savings for memory-bound workloads.”
Find the technical paper here. May 2026.
arXiv:2605.02371
Authors: Pau Díaz, Mariana Carmin, Pouya Esmaili-Dokht, Victor Xirau, Felippe Zacarias, Henrique Potter, Harald Servat, Miquel Moreto, Eduard Ayguadé, Petar Radojković
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