Micron Doubles Down on AI Memory With 256 GB DDR5 RDIMMs Hitting 9200 MT/s, a 40% Leap Over Today’s Modules

Micron has started to ship its fastest DDR5 RDIMM memory modules, which feature 256 GB capacities & up to 9200 MT/s speeds.

Micron Offers 40% Boost Vs Current "In-Volume" DDR5 RDIMM Memory Modules, Brings 256 GB Capacities With 9200 MT/s Speeds

As Agentic AI requirements grow, memory makers are rolling out faster and higher-capacity memory kits to meet the demands of AI firms. JEDEC is also pushing the DDR5 MRDIMM standard up to 12,800 MT/s, and today, Micron has announced that it is sampling its 256 GB DDR5 RDIMM modules with up to 9200 MT/s speeds. The main highlights include:

• Built on Micron's leading-edge 1-gamma DRAM technology with 3D stacking (3DS) and through-silicon via (TSV) packaging
• Capable of speeds up to 9,200 MT/s — more than 40% faster than modules in volume production today
• A single 256GB module reduces operating power by more than 40% versus two 128GB modules — a meaningful efficiency gain for data centers scaling LLM, agentic AI, and real-time inference workloads
• Co-validating across current and next-gen server platforms with ecosystem partners to accelerate production deployment

Press Release: Micron Technology, today, announced it has sampled 256GB DDR5 registered dual in-line memory modules (RDIMM) to key server ecosystem enablers. The module is built on the company’s leading-edge 1-gamma technology, which is capable of speeds up to 9,200 megatransfers per second (MT/s), greater than 40% faster than modules in volume production today.

Micron’s module employs advanced packaging techniques, 3D stacking (3DS), and multiple memory dies connected by through-silicon vias (TSVs). Combined with Micron’s 1-gamma DRAM, these innovations provide the capacity, speed, and power efficiency required to scale next-generation AI systems. A single 256GB module can reduce operating power by more than 40% versus two 128GB modules, enabling greater efficiency for modern AI data centers.

Ecosystem partner validation

Micron is collaborating with key ecosystem enablers to validate the 256GB 1-gamma DDR5 RDIMM across their respective current and next-generation server platforms. This co-validation ensures broad platform compatibility and accelerates the path to production deployment for data center customers building AI and HPC infrastructure at scale.

Meeting the memory demands of the AI era

The rapid proliferation of large language models (LLMs), agentic AI, real-time inference, and high-core-count CPU workloads is driving an urgent need for greater enterprise server memory capacity, higher bandwidth, and improved power efficiency. Micron’s 256GB DDR5 RDIMM addresses these growing requirements head-on, enabling server architects, hyperscale operators, and platform partners to maximize memory capacity per socket while operating within the thermal and power boundaries of modern data center infrastructure.

Sampling and availability
Micron’s 1 gamma-based 256GB DDR5 RDIMM is currently sampling to key server ecosystem enablers for platform validation.

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