Performance and Energy Benefits of MRDIMMs
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arXiv
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| Autori principali: | , , , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2026
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| Soggetti: | |
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| _version_ | 1866910188438552576 |
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| author | Díaz, Pau Carmin, Mariana Esmaili-Dokht, Pouya Xirau, Victor Zacarias, Felippe Potter, Henrique Servat, Harald Moreto, Miquel Ayguadé, Eduard Radojković, Petar |
| author_facet | Díaz, Pau Carmin, Mariana Esmaili-Dokht, Pouya Xirau, Victor Zacarias, Felippe Potter, Henrique Servat, Harald Moreto, Miquel Ayguadé, Eduard Radojković, Petar |
| contents | 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2605_02371 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Performance and Energy Benefits of MRDIMMs Díaz, Pau Carmin, Mariana Esmaili-Dokht, Pouya Xirau, Victor Zacarias, Felippe Potter, Henrique Servat, Harald Moreto, Miquel Ayguadé, Eduard Radojković, Petar Hardware Architecture 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. |
| title | Performance and Energy Benefits of MRDIMMs |
| topic | Hardware Architecture |
| url | https://arxiv.org/abs/2605.02371 |