The Samsung M321RAGA0B20-CWK is a 128GB DDR5 ECC Registered DIMM (RDIMM) frequently specified by system integrators and IT procurement teams for AI training clusters, virtualization hosts, cloud platforms, and database servers. For resellers, this is a high-turn enterprise memory SKU with stable demand across data center build-outs and capacity upgrades.
We supply this module to overseas wholesale buyers with batch-consistent stock: units within a single order ship from the same production lot/date code wherever possible, simplifying qualification and mixed-deployment validation across your customer sites. All modules are original Samsung product, and每一批 is inspected before dispatch.
Key specifications (table)
| Parameter | Specification |
|---|---|
| Brand | Samsung |
| Part Number | M321RAGA0B20-CWK |
| Memory Type | DDR5 ECC Registered DIMM (RDIMM) |
| Capacity | 128GB (single module) |
| Speed | DDR5-5600 / PC5-44800 |
| Data Transfer Rate | 5600 MT/s (actual rate may vary by platform support) |
| Rank Configuration | 2Rx4 (dual rank) |
| ECC Support | Yes (on-die plus registered ECC, per DDR5 RDIMM design) |
| Operating Voltage | 1.1V (lower than DDR4’s typical 1.2V) |
| Pin Count | 288-pin |
| Module Type | RDIMM |
| Chip Organization | High-Density DDR5 DRAM Components |
| CAS Latency | CL46 |
| Application | AI Servers, Cloud Computing, Databases, Data Centers, High-Performance Computing |
| Operating Environment | 24/7 Enterprise-Class Operation |
| Product Status | Enterprise-Class Mass Production |
Procurement Overview
Stock availability: this part number is a mass-production enterprise item and is regularly held in stock for export orders. For large volume requirements, lead times are confirmed at quotation; typical allocation is communicated within one business day of inquiry.
Warranty & RMA: units are covered by a standard wholesale warranty with a defined RMA window. Faulty units reported within the RMA period are replaced or credited under our reseller-grade after-sales process, with technical support available to assist with failure verification.
Export compliance: shipments are prepared for international delivery with CE, FCC, and RoHS conformity documentation available on request, supporting customs clearance and regulatory checks in major destination markets.
Good to know
- DDR5 RDIMMs are not backward compatible with DDR4 platforms, and DDR4 RDIMMs cannot be mixed with DDR5 in the same system — integrators should verify server generation and 288-pin DIMM slot support when quoting end customers.
- The 2Rx4 dual-rank 128GB configuration allows high-capacity builds with fewer populated slots, preserving expansion headroom — a strong selling point for virtualization and cache-tier deployments.
- Recommend that your customers check the platform’s validated memory (QVL) list and supported speed at target population, as achieving the rated 5600 MT/s depends on the CPU memory controller and DIMM configuration.
Whether you are a reseller stocking enterprise memory or a system integrator sourcing memory for full-server builds, our team can support volume requirements with consistent supply. For pricing, stock confirmation, and batch details, request a wholesale quote.
Wholesale & Procurement Notes
- MOQ negotiable depending on stock position and destination market
- Tiered volume pricing available — request a quote for your quantity band
- Typical lead time: 1–3 business days for in-stock orders; longer for scheduled volume allocations
- Packing & shipping: anti-static bulk packing or retail trays; DHL/FedEx/UPS air freight, consolidated sea freight on request
- RMA window: 12 months from invoice date, replacement or credit after verification
