Micron demonstrated a 512GB DDR5 RDIMM on multiple server platforms on September 15, 2026. The server-memory module targets AI, analytics, in-memory databases, simulations, virtualization, caching and other workloads that place heavy demands on memory capacity. Micron expects volume production in the second half of 2027.
Micron demonstrates a 512GB RDIMM for next-generation servers
The module uses the DDR5 Registered DIMM standard and has an announced transfer rate of up to 9,200 MT/s. Micron designed it for enterprise data centers and cloud infrastructure rather than ordinary desktop PCs.
The capacity comes from vertically stacked DRAM dies connected through through-silicon vias, or TSVs. These connections allow multiple memory dies to occupy the DRAM packages on the module, increasing capacity within a server-memory form factor.
Micron says a 24-slot, dual-socket server could support up to 12TB of DDR5 DRAM when populated with the 512GB modules.
| Specification | Announced value | Context |
| Memory type | DDR5 RDIMM | Registered server memory |
| Capacity | 512GB | Per module |
| Transfer rate | Up to 9,200 MT/s | Announced maximum |
| Memory packaging | Vertically stacked DRAM dies with TSV connections | Used to increase package density |
| Server capacity | Up to 12TB | 24-slot, dual-socket server |
Micron's efficiency comparison is tied to a specific configuration
For the same total capacity of 512GB, Micron compares one 512GB module using 16.0W with four 128GB RDIMMs using 44.2W in total. Micron describes the single-module arrangement as reducing operating power by more than 60% in that comparison.
| Configuration | Total capacity | Module count | Operating power in Micron's comparison |
| Micron 512GB DDR5 RDIMM | 512GB | 1 | 16.0W |
| Four 128GB DDR5 RDIMMs | 512GB | 4 | 44.2W total |
Micron also claims up to 1.4× the performance of 256GB DDR5 configurations in memory-bound Spark Support Vector Machine, or SVM, analytics workloads. That figure belongs to the specified Spark SVM workload and comparison rather than to every server application.
AMD and Intel are validating the server platform
AMD and Intel are validating the 512GB DDR5 RDIMM across next-generation server platforms. The module therefore belongs to the server-memory ecosystem, where compatibility depends on the platform's support for RDIMM technology.
An RDIMM includes components such as a Register Clock Driver, or RCD, a power-management integrated circuit, or PMIC, and an SPD hub. These parts support the module's management and signaling functions. RDIMMs and consumer UDIMMs use different platform designs and are physically incompatible in the slot demonstration shown in the technical explainer.
What the 512GB module means for data centers
A single module with this capacity can let server designers place more memory in a given slot count. That matters for large language models, real-time inference, databases kept in memory, analytics, simulations, virtualization, RocksDB and Redis—workloads in which moving data between main memory and slower storage can become a system bottleneck.
Micron's announced figures also frame the module as a density decision. One 512GB RDIMM replaces four 128GB RDIMMs for the same stated capacity, while the 24-slot, dual-socket example reaches up to 12TB of DDR5 DRAM.
The module remains a demonstrated server-memory solution with volume production planned for the second half of 2027. AMD and Intel's validation work is focused on next-generation server platforms.
