Micron Demonstrates 512GB DDR5 RDIMM, Targets Second-Half 2027 Production

Micron Technology on September 15, 2026 announced the successful demonstration of what it describes as the world’s first 512GB DDR5 RDIMM, a registered dual in-line memory module, across multiple server platforms. Micron said the module will deliver speeds up to 9,200 MT/s, and that AMD and Intel are both actively validating it.

Micron said the demonstration gives enterprise data center and cloud customers a path to support large and demanding AI, analytics, in-memory database and simulation-heavy workloads with greater efficiency. According to the company, the module enables up to 12TB of DDR5 DRAM in a single 24-slot dual-socket server.

Stacked DRAM Packaging

The module’s capacity rests on Micron’s advanced vertical interconnect packaging. The design vertically stacks DRAM dies interconnected by through-silicon vias, or TSVs, an approach Micron said maximizes density within individual DRAM packages while preserving the performance modern data center architectures demand.

Raj Narasimhan, senior vice president and general manager of Micron’s Cloud Memory Business Unit, described the module as part of a new class of ultra-dense, high-performance server memory intended to keep larger datasets closer to the compute engines that need them. “A 512GB RDIMM enables multi-terabyte servers, supporting larger AI and database workloads, greater virtualization density and improved power efficiency, all within existing server footprints,” he said.

Ecosystem Validation

Micron said it is collaborating with ecosystem enablers to validate the 512GB DDR5 RDIMM across next-generation server platforms, with the goal of ensuring broad compatibility and a smooth path to deployment.

Amit Goel, corporate vice president of Compute and Enterprise AI Platform Solutions Engineering at AMD, said the engineering collaboration between the two companies is intended to bring compute and memory innovation together so customers can realize the full value of AMD-powered platforms as AI and data-intensive workloads reshape infrastructure requirements.

Karin Eibschitz Segal, general manager of platform and system engineering in Intel’s Data Center Group, said Intel is working with Micron to validate the 512GB DDR5 RDIMM and to help enable future server platforms. She described memory capacity and bandwidth as increasingly important to overall system performance as AI and other data-intensive workloads place new demands on server infrastructure.

Darrin Alves, chief information officer for Infrastructure Platforms at JPMorganChase, said his organization is increasingly focused on optimizing the balance between compute, memory and efficiency across the stack as data center workloads grow. “Higher-capacity memory technologies like Micron’s 512GB RDIMMs will help enterprises support larger in-memory workloads, improve resource utilization and enhance the flexibility needed to scale modern computing environments,” he said.

Power and Performance Claims

Micron said the 512GB RDIMM reduces operating power by more than 60% compared with four 128GB RDIMMs, a comparison the company footnoted as based on 16.0 watts for one 512GB module against a combined 44.2 watts for four 128GB modules.

For memory-bound workloads such as Spark Support Vector Machines-based data analytics, Micron said the 512GB RDIMMs can deliver up to 1.4 times higher performance than 256GB DDR5 configurations. The company also said the module provides advantages for memory-intensive databases and caching platforms, including RocksDB and Redis, citing improved throughput, increased concurrency and more efficient scaling of datasets.

Micron identified the rapid proliferation of large language models, agentic AI, real-time inference and high-core-count CPU workloads as the driver of demand for greater server memory capacity, higher bandwidth and improved power efficiency. The company said the modules address those demands by enabling larger datasets to remain resident in main memory, reducing reliance on slower storage tiers and minimizing costly data movement.

Earlier 256GB Sampling and Production Plans

Micron previously announced on May 12, 2026 that it had sampled a 256GB DDR5 RDIMM to server ecosystem enablers for platform validation. That module is built on the company’s 1-gamma DRAM and employs 3D-stacked memory dies connected by through-silicon vias. Micron said it is capable of speeds up to 9,200 MT/s, a figure the company described at the time as more than 40% faster than modules in volume production, based on a comparison against products running at 6,400 MT/s. Micron also said a single 256GB module can reduce operating power by more than 40% versus two 128GB modules.

Micron said it expects the 512GB RDIMMs to be in volume production sometime in the second half of 2027, aligned to customer needs.