M321R8GA0EB0-CWM - 64GB DDR5-5600 ECC RDIMM | Samsung
MPN: M321R8GA0EB0-CWM ✓ Active| Qty | Unit Price | Extended |
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| 10 | $0 | $0.00 |
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| 500 | $0 | $0.00 |
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Drop-in alternatives for M321R8GA0EB0-CWM — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
M321R8GA0EB2-CWM
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View Datasheet →M321R4GA3EB0-CWM
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View Datasheet →M321R4GA0EB0-CWM
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View Datasheet →M321R2GA3EB0-CWM
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View Datasheet →M321R8GA0EB0-CWM Maximum Ratings & Electrical Characteristics
| Capacity | 64 GB (1 x 64 GB) |
| Memory Type | DDR5 SDRAM |
| Form Factor | 288-pin DIMM |
| Module Type | ECC Registered DIMM (RDIMM) |
| Data Rate | 5600 MT/s (PC5-44800) |
| Organization | 8Gx72 |
| Rank Configuration | 2Rx4 (Dual Rank, x4) |
| DRAM Composition | 40 x FBGA 4Gx4 DDR5 DRAM |
| Operating Voltage | 1.1 V |
| CAS Latency | CL46 |
| Error Correction | ECC (Registered) |
| Bandwidth Class | 44800 MB/s |
| Primary Applications | Server / Datacenter (Intel Xeon Scalable, AMD EPYC) |
| Standards Compliance | JEDEC DDR5 compliant |
| OEM Compatibility | Dell, HPE, Supermicro and other DDR5 server platforms |
| Mounting Type | Slot-mounted server memory slot |
M321R8GA0EB0-CWM standard Pin Configuration Guide
Complete pinout information for M321R8GA0EB0-CWM (standard package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for M321R8GA0EB0-CWM.
Refer to the datasheet for full pin configuration.
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this digital IC. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
M321R8GA0EB0-CWM is suitable for 6 applications: Virtualization Hosts / Multi-VM Consolidation, Database Servers, Enterprise Datacenter Standard Compute, In-Memory Analytics / HPC Data Nodes, OEM Server Manufacturing & Integration, Memory Capacity Upgrades / Server Refresh.
Virtualization Hosts / Multi-VM Consolidation
The M321R8GA0EB0-CWM's 64GB-per-slot capacity directly raises virtual machine consolidation ratios: a dual-socket platform populated with 16 of these modules provides 1TB of DDR5-5600 memory, enough to host hundreds of lightweight VMs or dozens of memory-heavy database VMs. Its 5600 MT/s rate and 2Rx4 dual-rank organization maximize per-channel bandwidth, which matters when many VMs contend for memory concurrently. Installed in standard DDR5 RDIMM slots on Intel Xeon Scalable and AMD EPYC boards, it requires no special configuration beyond symmetric population; the registered interface keeps signal integrity stable at full slot count, and on-module ECC protects long-running virtualization workloads from uncorrected memory errors.
Recommended
Database Servers
Database engines such as MySQL, PostgreSQL, and SAP HANA scale their buffer pools with available RAM, and the M321R8GA0EB0-CWM's 64GB capacity lets a single node reach multi-terabyte memory footprints without exhausting DIMM slots. The 5600 MT/s (PC5-44800) bandwidth class reduces latency for random buffer-pool reads compared with DDR4-3200 RDIMMs, and the 8Gx72 ECC organization corrects single-bit errors that would otherwise corrupt cached pages over long uptimes. Populating all channels symmetrically with these dual-rank modules delivers maximum memory bandwidth for analytical scans and join-heavy queries; budget roughly 8-12W thermal per module in server cooling design.
Recommended
Enterprise Datacenter Standard Compute
For standard datacenter compute nodes from Dell, HPE, and Supermicro, the M321R8GA0EB0-CWM is a JEDEC-compliant DDR5-5600 RDIMM validated against mainstream server memory population rules. Its 1.1V supply lowers memory-subsystem power versus DDR4's 1.2V, and DDR5's on-module power management network regulates VDD locally, easing platform power-delivery design at high slot counts. Distributors specifically list this MPN as compatible with Dell and HPE DDR5 platforms, simplifying procurement for mixed-fleet refreshes. Deploy it in pairs or quads per channel following the OEM population table to hold the full 5600 MT/s speed grade across dual-rank configurations.
Recommended
In-Memory Analytics / HPC Data Nodes
In-memory analytics frameworks (Apache Spark, SAP HANA, in-memory caches) are bandwidth- and capacity-bound, and the M321R8GA0EB0-CWM addresses both: 64GB per module and a dual-rank 2Rx4 arrangement that keeps DRAM banks interleaved for sustained throughput at 5600 MT/s. An 8-channel EPYC node filled with these modules delivers several hundred GB/s of aggregate memory bandwidth. The x4 DRAM organization with registered ECC adds chipkill-class resilience options on supporting platforms, important for long-running scientific and analytics jobs. Estimated per-module power of 8-12W should be reflected in node-level thermal budgets at full population.
Recommended
OEM Server Manufacturing & Integration
System integrators building branded servers for Dell, HPE, and Supermicro ecosystems use the M321R8GA0EB0-CWM as an OEM Samsung module with a traceable part number, which simplifies warranty validation and bill-of-materials qualification. Because it is 100% JEDEC DDR5 compliant, the same module image qualifies across multiple motherboard vendors, reducing requalification cost when platforms change. The 40-die FBGA construction and registered ECC interface provide the reliability profile enterprise buyers expect. Integrators should verify BIOS/SPD compatibility per build and can substitute the EB2 revision where the EB0 build is unavailable without BOM re-approval in most programs.
Recommended
Memory Capacity Upgrades / Server Refresh
When upgrading existing DDR5 servers, the M321R8GA0EB0-CWM slots directly into vacant DDR5 RDIMM sockets without firmware changes, doubling density where 32GB modules are already installed. It down-clocks automatically on platforms limited to DDR5-4800, so it is safe to deploy ahead of platform refresh while still gaining capacity immediately. Compatibility testing by third-party replacement vendors (NEMIX RAM, A-Tech) confirms the drop-in profile of this specification class across Dell and HPE DDR5 systems. Plan upgrades per the OEM population table: mixing single-rank and dual-rank modules across channels can derate speed, so fill channels with identical 2Rx4 modules where possible.
Recommended
Recommended Products Summary
Engineering reference data for M321R8GA0EB0-CWM — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | M321R8GA0EB2-CWM | M321R6GA0PB0-CWM | M321R4GA3EB0-CWM | M321R4GA0EB0-CWM |
|---|---|---|---|---|---|
| Package | 288-pin DIMM | 288-pin DIMM - same | 288-pin DIMM - same | 288-pin DIMM - same | 288-pin DIMM - same |
| Brand | Samsung Electronics | Samsung Electronics | Samsung Electronics | Samsung Electronics | Samsung Electronics |
| Capacity | 64 GB | 64 GB | 64 GB | 32 GB | 32 GB |
| Data Rate | 5600 MT/s (PC5-44800) | 5600 MT/s | 5600 MT/s | 5600 MT/s | 5600 MT/s |
| Module Type | ECC Registered DIMM (RDIMM) | ECC RDIMM | ECC RDIMM | ECC RDIMM | ECC RDIMM |
| Rank Configuration | 2Rx4 (Dual Rank) | 2Rx4 | [DATA_NEEDED] | 2Rx8 | [DATA_NEEDED] |
| Operating Voltage | 1.1 V | 1.1 V | 1.1 V | 1.1 V | 1.1 V |
| CAS Latency | CL46 | CL46 | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
| Typical Deployment | 64GB-per-slot server builds | Identical-spec builds / EB0 substitute | 64GB alternative generation | 32GB density tier | 32GB density tier |
Key Differentiators
- Maximum 64GB density per slot in this family (vs M321R4GA3EB0-CWM)
- Full 5600 MT/s dual-rank x4 bandwidth configuration (vs M321R2GA3EB0-CWM)
- Dual sourcing within Samsung via EB0/EB2 revisions (vs M321R8GA0EB2-CWM)
Design Notes
Do not mix RDIMMs with UDIMMs or LRDIMMs in the same system - DDR5 server platforms validate the module type at POST and will refuse to boot or derate unexpectedly. Also, do not assume 5600 MT/s is automatic: many platforms only sustain 5600 MT/s with one DIMM per channel (1DPC); populating two DIMMs per channel may train down to 4800 MT/s. Always consult the server OEM's memory population table before ordering quantities, and keep all modules in a channel identical in rank and organization for the best training result.
Estimated: a fully populated dual-socket server with 24 of these 64GB DDR5-5600 RDIMMs dissipates on the order of 200-300W across the memory subsystem alone (roughly 8-12W per dual-rank module under load). Ensure chassis airflow paths cover DIMM slots, and enable platform memory thermal throttling policies. DDR5's on-module PMIC regulates the 1.1V rail locally, so module-level hot spots concentrate near the PMIC; server vendors set thermal limits in BIOS that should not be overridden.
Estimated: compared with an equivalent DDR4-3200 RDIMM configuration at 1.2V, the 1.1V DDR5 M321R8GA0EB0-CWM reduces per-module supply voltage by about 8%, translating to meaningful platform-level savings at high slot counts (roughly 15-30W for a 16-module server). DDR5 also moves power conversion onto the module via a 12V input and on-DIMM PMIC, so verify that the server PSU and 12V distribution are within the OEM platform specification. Bulk capacitors on module 12V rails are handled by the platform design - no user configuration needed.
Compliance Information
Module is stated as 100% JEDEC DDR5 compliant by distributor listings. Specific RoHS/REACH declarations were not present in the provided source data.
