The Samsung M321R4GA0BB0-CQK is a 32GB DDR5 ECC Registered DIMM (RDIMM) running at DDR5-4800 (PC5-38400), a core SKU for resellers and system integrators building server, workstation, data center and cloud platform configurations. As a registered, ECC-protected module it targets virtualization hosts, cache tiers and other memory-sensitive enterprise workloads. procurement teams should note that this is a DDR5 RDIMM part only — it cannot be installed in DDR4 slots or combined with UDIMM modules in the same chassis.
Key specifications (table)
| Parameter | Specification |
| Brand | Samsung |
| Part Number | M321R4GA0BB0-CQK |
| Memory Type | DDR5 ECC Registered DIMM (RDIMM) |
| Capacity | 32GB |
| Speed | DDR5-4800 / PC5-38400 |
| Data Transfer Rate | 4800 MT/s |
| Rank Configuration | 2Rx8 (dual rank) |
| ECC Support | Yes |
| Operating Voltage | 1.1V |
| Pin Count | 288-pin |
| Module Type | RDIMM |
| Chip Organization | (2G × 8) × 20 |
| CAS Latency | CL40 |
| Application | Enterprise Servers, Workstations, Data Centers, Cloud Computing Platforms |
| Operating Environment | 24/7 Enterprise-Class Operation |
| Product Status | Enterprise-Class Mass Production |
Supply & Compatibility Overview
This SKU is held in production status by Samsung and is regularly stocked in volume for B2B channel distribution. Orders can be fulfilled with batch-consistent modules (matched date codes and firmware revisions) on request — an important consideration for integrators deploying multi-node clusters where uniform memory populations simplify validation and BIOS configuration.
All units ship as original, factory-sealed Samsung product with full manufacturer warranty support. RMA requests are processed through our channel support desk with defined turnaround targets, so resellers can pass warranty assurance downstream to their own customers with confidence.
For project planning purposes, quotations typically include confirmed stock position, batch availability and estimated dispatch dates. Standard export documentation is provided, and the product carries CE, FCC and RoHS compliance for deployment in major international markets. As with any registered memory purchase, buyers should validate the part number against the target platform’s qualified vendor list (QVL) before committing to volume orders, since supported speeds and rank populations are platform dependent.
Within the DDR5 RDIMM lineup, this module occupies the 4800 MT/s speed grade in a dual-rank 2Rx8 layout; dual-rank population can raise effective bandwidth in memory-bound workloads, though certain platforms limit the number of dual-rank DIMMs per channel. Integrators planning mixed configurations should consult the motherboard vendor’s population guidelines.
To check current availability, batch consistency options and volume pricing for this part, please request a wholesale quote and our procurement team will respond with a formal offer.
Wholesale & Procurement Notes
- MOQ negotiable depending on stock position and project size
- Tiered volume pricing available — request a quote for your quantity break
- Typical lead time: 3–7 business days for in-stock batches; longer for scheduled volume releases
- Packing & shipping: anti-static sealed retail/bulk trays, consolidated freight or express options with export documentation
- RMA window: standard manufacturer warranty with DOA coverage and channel RMA handling
