The Samsung M321R8GA0PB0-CWM is a 64GB DDR5-5600 registered ECC DIMM supplied through our TO-B distribution channel for enterprise server builds, cloud infrastructure rollouts, database platforms, and AI training clusters. It is a high-turnover item for resellers and system integrators building DDR5-generation server platforms that require registered modules with on-die ECC. Note that RDIMMs are keyed differently from desktop UDIMMs and cannot be mixed with DDR4 or DDR3 memory on any platform — a frequent cause of returns, so we recommend briefing downstream customers accordingly.
Key specifications (table)
| Parameter | Specification |
|---|---|
| Brand | Samsung |
| Part Number | M321R8GA0PB0-CWM |
| Memory Type | DDR5 ECC Registered DIMM (RDIMM) |
| Capacity | 64GB |
| Speed | DDR5-5600 / PC5-44800 |
| Data Transfer Rate | 5600 MT/s |
| Rank Configuration | 2Rx4 (dual-rank) |
| ECC Support | Yes |
| Operating Voltage | 1.1V |
| Pin Count | 288-pin |
| Module Type | RDIMM |
| Chip Organization | (4G × 4) × 40 |
| CAS Latency | CL46 |
| Application | Enterprise servers, cloud computing, AI training, databases, data centers |
| Operating Environment | 24/7 enterprise-class operation |
| Product Status | Mass production |
Supply & Channel Information
This SKU is stocked in volume and typically ships from available inventory. Orders drawn from the same lot, ensuring batch consistency for matched-set deployments — critical for channel population requirements on dual-socket servers. If single-batch supply is required for large projects, please specify this at the time of ordering and we will confirm lot availability.
All units are original Samsung product with full manufacturer warranty support. RMA handling is processed through our wholesale channel with defined turnaround times and advance-replacement options for qualified partners. Products carry CE, FCC and RoHS certifications, and export documentation can be prepared for international shipments.
Lead times for stock items are typically 1–3 business days for dispatch; larger project quantities or backorder volumes are quoted with a confirmed delivery schedule. Platform compatibility notes: DDR5 RDIMMs require a DDR5-compatible server platform (current-generation Intel Xeon or AMD EPYC); verify the motherboard QVL and maximum supported speed, as the effective data rate may be derated when many DIMMs are populated per CPU.
For integrators planning virtualization hosts and cache tiers, the 64GB 2Rx4 configuration offers a strong balance of density and channel efficiency. We advise ordering identical modules in matched sets per CPU memory channel; mixing capacities or ranks across channels can reduce effective bandwidth or prevent POST. For current stock levels, batch allocation and volume pricing, please request a wholesale quote.
Wholesale & Procurement Notes
- MOQ negotiable depending on project scale and stock position.
- Tiered volume pricing available — request a quote for project quantities.
- Typical lead time: 1–3 business days for in-stock items; scheduled delivery for bulk orders.
- Packing & shipping options: anti-static bulk packaging, retail-boxed units, air or sea freight consolidation, export documentation provided.
- RMA window: 12-month warranty coverage with wholesale-channel RMA processing.
