M321R4GA3PB0-CWM - 32GB DDR5-5600 ECC RDIMM | Samsung | Servers
MPN: M321R4GA3PB0-CWM β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $89 | $89.00 |
| 10 | $84.55 | $845.50 |
| 100 | $79.2 | $7,920.00 |
| 500 | $74.75 | $37,375.00 |
| 1,000 | $70.5 | $70,500.00 |
Drop-in alternatives for M321R4GA3PB0-CWM β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
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M321R4GA0PB0-CWM
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M321R4GA3EB0-CWM
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View Datasheet βM321R4GA3PB0-CWMCJ
β Drop-Inπ Reference alternative (not in catalog)
NEMIX RAM 32GB DDR5-5600 2Rx8 RDIMM CL46
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A-Tech 32GB PC5-44800R 2Rx8 RDIMM
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M321R4GA3PB0-CWM Maximum Ratings & Electrical Characteristics
| Module Type | 288-pin RDIMM (Registered DIMM) |
| Memory Technology | DDR5 SDRAM |
| Capacity | 32 GB (4Gx72) |
| Data Rate | 5600 Mbps (PC5-44800) |
| Operating Voltage | 1.1 V |
| Organization | 2Rx8 (Dual Rank, x8) |
| ECC | ECC Registered |
| CAS Latency | CL46 |
| DRAM Composition | 20 x 2Gx8 FBGA DDR5 components |
| Pin Count | 288 |
| Form Factor | 288-pin DIMM |
| Mounting Type | Slot (DIMM socket) |
| Compliance | JEDEC DDR5 standard |
| Compatible Platforms | Intel Xeon Scalable / Emerald Rapids, AMD EPYC servers |
| Bandwidth | 44.8 GB/s per module (PC5-44800) |
| Stock (icDirectory) | 34200 pcs (updated Aug 17, 2026) |
M321R4GA3PB0-CWM standard Pin Configuration Guide
Complete pinout information for M321R4GA3PB0-CWM (standard package) with 288 pins. 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 M321R4GA3PB0-CWM.
Refer to the datasheet for full pin configuration.
Estimated pin count: 288 pins (digital package)
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
M321R4GA3PB0-CWM is suitable for 6 applications: Enterprise General-Purpose Servers, Lenovo ThinkSystem V3/V4 Platforms, Dell PowerEdge R660 Servers, Edge Compute Nodes, Workstations and AI Development Boxes, Cloud Infrastructure Memory Expansion.
Enterprise General-Purpose Servers
The M321R4GA3PB0-CWM fits general-purpose enterprise servers because its 32GB DDR5-5600 2Rx8 configuration delivers 44.8 GB/s per module at only 1.1V, cutting memory subsystem power versus DDR4-3200 RDIMMs while nearly doubling bandwidth. Registered ECC operation with on-die ECC protects against DRAM cell errors in always-on datacenter duty cycles. In a two-socket Xeon or EPYC server, populating all eight channels per CPU with these modules yields 512GB per socket at up to 358 GB/s aggregated bandwidth. Use symmetric channel population per the platform QVL to achieve the full 5600 MT/s speed bin.
Recommended
Lenovo ThinkSystem V3/V4 Platforms
Lenovo ThinkSystem SR630 V3, SR650 V3, SR650 V4, and SD650 V3 servers qualify this exact MPN through Lenovo part cross-reference 4X77A95267 (per RAMQuote). The module's JEDEC-standard 288-pin DDR5 RDIMM interface with SPD-based configuration enables automatic training at 5600 MT/s in 1DPC configurations on these platforms. For the SD650 V3 water-cooled edge appliance, the module's low 1.1V operation contributes to reduced thermal load in the sealed cooling loop. Confirm BIOS supports the PB0 die revision and populate channels per the Lenovo memory configuration guide for full bandwidth.
Recommended
Dell PowerEdge R660 Servers
Dell PowerEdge R660, R660xs, MX760c, and C6620 platforms accept the CWMCJ suffix variant of this module (Dell cross-reference SNPP8XPWC/32G), and the M321R4GA3PB0-CWM itself serves these 4th/5th-gen Xeon Scalable systems as a JEDEC-compliant alternative. The R660's eight DDR5 channels per CPU benefit from the module's dual-rank organization, which improves bank parallelism and sustained bandwidth for virtualization and database workloads. At 32GB per module, 16 modules yield 512GB per server. Verify against the Dell Memory Configurator before mixing suffixes within a channel.
Recommended
Edge Compute Nodes
Samsung positions the M321R4GA3PB0-CWM specifically for edge compute and low-VM-density hosts, where 32GB modules balance capacity per DIMM slot against thermal and power budgets in constrained enclosures. The 1.1V DDR5 operation with onboard PMIC regulation reduces per-module power draw to roughly 4-6W typical, critical for passively cooled or conduction-cooled edge appliances. The dual-rank 2Rx8 topology maintains bandwidth efficiency for network-intensive edge workloads such as content caching and 5G UPF processing. Pair with industrial-grade SSDs and wide-temperature PSUs for full edge deployment.
Recommended
Workstations and AI Development Boxes
High-end workstations built on workstation-class Xeon W or Threadripper PRO platforms accept this 32GB DDR5-5600 RDIMM when the board supports registered memory. Its 44.8 GB/s bandwidth and 32GB density suit CAD, simulation, and local LLM development, where 256GB+ system memory is needed to hold model weights and datasets. ECC registered operation prevents silent data corruption during long training or render jobs. Note that consumer desktop boards requiring UDIMMs cannot accept this module; verify RDIMM support in the workstation board specification before purchase.
Recommended
Cloud Infrastructure Memory Expansion
Cloud and hosting providers use the M321R4GA3PB0-CWM for fleet-wide standardization: its JEDEC DDR5-5600 profile and wide qualification across Dell, HPE, and Lenovo platforms make it a common denominator SKU that simplifies spares pooling and RMA logistics. The 34,200-piece distributor stock level (icDirectory, Aug 2026) supports large-scale volume deployment without allocation risk. In hyper-converged infrastructure, 2Rx8 modules provide the rank interleave that benefits storage-tier and VM-scheduler performance. Standardize one suffix per fleet generation to avoid BIOS training variability.
Recommended
Recommended Products Summary
Engineering reference data for M321R4GA3PB0-CWM β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | M321R4GA0PB0-CWM | M321R4GA3EB0-CWM | NEMIX RAM 32GB DDR5-5600 2Rx8 RDIMM CL46 | A-Tech 32GB PC5-44800R 2Rx8 RDIMM |
|---|---|---|---|---|---|
| Package | 288-pin RDIMM | 288-pin RDIMM - same | 288-pin RDIMM - same | 288-pin RDIMM - same | 288-pin RDIMM - same |
| Brand | Samsung Electronics | Samsung Electronics | Samsung Electronics | NEMIX RAM | A-Tech Memory |
| Capacity | 32 GB | 32 GB | 32 GB | 32 GB | 32 GB |
| Data Rate | DDR5-5600 (PC5-44800) | DDR5-5600 | DDR5-5600 | DDR5-5600 | DDR5-5600 |
| Operating Voltage | 1.1 V | 1.1 V | 1.1 V | 1.1 V | 1.1 V |
| Rank/Organization | 2Rx8 (4Gx72) | 2Rx8 | 2Rx8 | 2Rx8 | 2Rx8 |
| CAS Latency | CL46 | [DATA_NEEDED] | [DATA_NEEDED] | CL46 | CL46 |
| OEM Qualified Platforms | Lenovo ThinkSystem SR630/SR650 V3/V4, SD650 V3 (4X77A95267) | Equivalent per icDirectory | Listed interchangeable (A-Tech/Newegg) | Emerald Rapids, Xeon Scalable, PowerEdge, ProLiant (compatibility-tested) | Server/workstation replacement, QA tested |
Key Differentiators
- Dual-rank 2Rx8 organization for higher bandwidth (vs M321R2GA3PB0-CWM (16GB sibling))
- Broad OEM qualification footprint (vs M321R4GA3PB0-CWMCJ)
- Samsung first-party supply vs third-party (vs NEMIX RAM 32GB DDR5-5600 2Rx8 RDIMM CL46)
Design Notes
Populate DDR5 RDIMM channels symmetrically per the server QVL. Mixing M321R4GA3PB0-CWM with different rank counts (1Rx8 or 2Rx8 variants) or suffixes within the same channel can force all modules to a slower common speed (often 4800 MT/s in 2DPC configurations) or prevent POST. Always check the platform's qualified vendor list (Lenovo 4X77A95267, Dell SNPP8XPWC/32G cross-references) before ordering volume.
DDR5 moves the power management IC (PMIC) onto the module, regulating 12V/5V input down to the 1.1V DRAM rail locally. This improves voltage accuracy versus DDR4 but adds a module-level point of failure; in high-availability fleets, enable the platform's memory PMIC telemetry/alerting. Estimated total module power is roughly 4-6W typical per 32GB RDIMM at DDR5-5600 - budget server PSU headroom and chassis airflow accordingly for fully populated (24-32 DIMM) configurations.
The registered (buffered) interface offloads command/address loading from the CPU memory controller, enabling 2DPC operation and long trace lengths in 2U/4U servers. Do not attempt to use this RDIMM in consumer desktop boards requiring UDIMMs - the register and different SPD profile prevent operation even though the 288-pin DDR5 connector appears physically similar. BIOS memory training occurs on every boot; after adding modules, allow a full multi-reboot training cycle and verify posted speed via OS tools (e.g., dmidecode).
Compliance Information
Samsung enterprise DDR5 RDIMMs are RoHS-compliant and lead-free per standard Samsung module manufacturing; JEDEC DDR5 compliance confirmed by distributor listings. Specific REACH and conflict-minerals declarations not found in provided data.
