The Samsung M321R8GA0BB0-CQK is a 64GB DDR5-4800 registered ECC DIMM (RDIMM) targeted at enterprise server deployments, virtualization clusters, and cloud infrastructure built for continuous 24/7 operation. Its register-based address/command buffering supports higher DIMM populations per channel than UDIMM alternatives, which is why this SKU is a recurring line item for system integrators configuring dense virtualization nodes and cache-tier servers. Procurement teams should note that DDR5 RDIMMs are not backward compatible with DDR4 platforms; please validate CPU and motherboard support (typically Intel Xeon Scalable or AMD EPYC with DDR5 memory controllers) before placing volume orders.
Key specifications (table)
| Parameter | Specification |
|---|---|
| Brand | Samsung |
| Part Number | M321R8GA0BB0-CQK |
| Memory Type | DDR5 ECC Registered DIMM (RDIMM) — not interchangeable with DDR4 modules |
| Capacity | 64GB |
| Speed | DDR5-4800 / PC5-38400 |
| Data Transfer Rate | 4800 MT/s (actual rate may be limited by CPU/memory controller support) |
| Rank Configuration | 2Rx4 (dual rank) |
| ECC Support | Yes — on-die ECC plus registered parity, suited to data-integrity-critical workloads |
| Operating Voltage | 1.1V (lower than DDR4’s typical 1.2V) |
| Pin Count | 288-pin |
| Module Type | RDIMM |
| Chip Organization | (4G × 4) × 20 |
| CAS Latency | CL40 |
| Application | Enterprise servers, cloud computing, virtualization platforms, data centers |
| Operating Environment | 24/7 enterprise-class operation |
| Product Status | Enterprise-class mass production |
Sourcing & Deployment Guidance for B2B Buyers
- Platform fit: 288-pin DDR5 RDIMMs fit only DDR5 registered-DIMM slots and cannot be mixed with DDR4 modules or consumer-grade UDIMMs/SODIMMs. Integrators should verify the platform QVL and confirm support for the 4800 MT/s tier, since multi-DIMM-per-channel population rules may downclock the bus.
- Channel planning: within Samsung’s DDR5 RDIMM portfolio, this dual-rank (2Rx4) 64GB module offers a strong balance of capacity and per-channel DIMM headroom, making it a standard build choice for virtualization hosts where both aggregate bandwidth and memory population density are design constraints.
- Batch consistency: for mixed-population stability, we recommend ordering identical part number, rank, and speed per server. We can support batch-matched shipments from the same production lot for deployments requiring uniform modules — please specify this requirement at order time.
- Stock & compliance: this SKU is a current mass-production enterprise part with stable channel availability. All shipments carry CE, FCC, and RoHS certifications for export to major markets, with standard export documentation provided for wholesale orders.
Wholesale & Procurement Notes
- MOQ negotiable — smaller trial quantities available for qualified resellers and integrators.
- Tiered volume pricing available; request a wholesale quote for current pricing and stock confirmation.
- Typical lead time: 3–7 business days for in-stock items; larger batch orders quoted individually.
- Packing options include original retail boxes, anti-static bulk trays, or custom private-label packing; shipped via DHL/FedEx/UPS with tracking.
- Warranty: 12-month limited warranty with a 30-day RMA window for DOA units, handled through our dedicated B2B after-sales channel.
