M321R6GA0PB0-CWM - 48GB DDR5-5600 ECC RDIMM | Samsung
MPN: M321R6GA0PB0-CWM β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $340 | $340.00 |
| 10 | $326 | $3,260.00 |
| 100 | $312 | $31,200.00 |
| 500 | $298 | $149,000.00 |
| 1,000 | $285 | $285,000.00 |
Drop-in alternatives for M321R6GA0PB0-CWM β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
M321R6GA3PB0-CWM
β Drop-Inπ Reference alternative (not in catalog)
M321R4GA3PB0-CWM
β Drop-Inβ In Stock
$70.5 / Unit
View Datasheet βM321R3GA3PB0-CWM
β Drop-Inβ In Stock
Contact for price
View Datasheet βM321R8GA0PB0-CWM
β Drop-Inπ Reference alternative (not in catalog)
M324R2GA3DB0-CWM
β Drop-Inπ Reference alternative (not in catalog)
M324R4GA3PB0-CWM
β Drop-Inπ Reference alternative (not in catalog)
M321R6GA0PB0-CWM Maximum Ratings & Electrical Characteristics
| Memory Type | DDR5 SDRAM |
| Module Type | 288-pin RDIMM (ECC Registered) |
| Capacity | 48 GB |
| Configuration | 1 x 48 GB, 1Rx4 (6Gx72) |
| Data Rate | 5600 Mbps (MT/s) |
| Bandwidth Class | PC5-44800 |
| CAS Latency | CL46 |
| Operating Voltage | 1.1 V |
| Form Factor | 288-pin DIMM |
| ECC | Yes (ECC Registered, on-die ECC) |
| DRAM Organization | 20 x FBGA 6Gb x4 DDR5 DRAM |
| Ranks | Single rank (1Rx4) |
| Application | Server |
| Product Colour | Green |
| Packaging | Bulk |
| Lifecycle Status | Mass Production |
M321R6GA0PB0-CWM standard Pin Configuration Guide
Complete pinout information for M321R6GA0PB0-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 M321R6GA0PB0-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
M321R6GA0PB0-CWM is suitable for 6 applications: Midrange Rack Servers, Virtualization Hosts, Dense Blade and Modular Systems, Storage Controllers and Appliances, Workstations and Compute Appliances, Memory Expansion for OEM Builds.
Midrange Rack Servers
The M321R6GA0PB0-CWM fits midrange 1U/2U rack servers that use 16 to 24 DDR5 DIMM slots per socket with RDIMM-only support. Its 48GB single-rank 1Rx4 organization maximizes capacity per slot while leaving headroom on the memory bus, and the 5600 MT/s rate delivers up to 44.8 GB/s theoretical bandwidth per module to feed modern Xeon and EPYC memory controllers. Deployed in matched channel sets, these modules let a two-socket node reach 1.5-2TB of main memory. Because DDR5 splits each DIMM into two independent 40-bit subchannels, concurrent reads from both subchannels improve effective utilization over DDR4 at the same slot count, benefiting database and consolidation workloads typical of midrange racks.
Recommended
Virtualization Hosts
Virtualization hosts running intermediate VM workloads are the primary target stated by Samsung channel distributors for the M321R6GA0PB0-CWM. Hypervisor memory overhead (per-VM metadata, shadow structures, and ballooning reserves) grows with VM count, so 48GB per DIMM allows dense VM-per-slot ratios without filling every slot. The 5600 MT/s data rate with CL46 latency keeps memory access latency low under concurrent VM scheduling, and DDR5 on-die ECC contains single-bit errors transparently, protecting long-running guest uptime. Populating 8-12 of these modules per socket provides hundreds of GB per host while preserving empty slots for later expansion, a common pattern in VMware and Proxmox midrange clusters.
Recommended
Dense Blade and Modular Systems
Dense blade chassis and modular server bricks are constrained by slots and thermal budget, making high-capacity single-rank RDIMMs valuable. The M321R6GA0PB0-CWM's 48GB in one 288-pin slot at 1.1V keeps per-module power moderate - DDR5's on-module PMIC and reduced I/O voltage lower energy per bit versus DDR4 equivalents, easing airflow design in sealed blade trays. The 1Rx4 organization presents a lighter electrical load to the register than dual-rank alternatives, helping signal integrity at 5600 MT/s in high-population boards. System designers can mix these 48GB modules with Samsung 24GB/32GB siblings to tier capacity across blade bays while maintaining uniform speed bins across the platform.
Recommended
Storage Controllers and Appliances
Enterprise storage controllers use registered DDR5 memory for cache and metadata, where capacity and data integrity dominate. The M321R6GA0PB0-CWM provides 48GB per slot with ECC registration and on-die error correction, aligning with storage firmware that assumes server-grade memory. Its x4 device organization offers finer error granularity than x8 parts, valuable when a cache write loss corrupts filesystem metadata. At 5600 MT/s, the module sustains the read-modify-write traffic of RAID engines and deduplication indexes. Storage OEMs value that the M321 family spans 24GB to 64GB in the same slot, allowing one BOM footprint to scale appliance cache tiers from entry to high-end models.
Recommended
Workstations and Compute Appliances
High-end workstations and GPU compute appliances built on workstation-class DDR5 platforms with RDIMM support use the M321R6GA0PB0-CWM where more than 128GB of memory is required for simulation, rendering, or AI data preprocessing. Single-rank modules can reduce controller load in 8-slot boards, supporting higher stable speeds alongside installed accelerators. The 44.8 GB/s per-module bandwidth feeds CPU-side data staging for GPU clusters, and the 48GB density keeps slot count low, freeing board area for PCIe lanes. The CWM speed bin matches mainstream DDR5-5600 platform validation, simplifying qualification against vendor memory QVLs for volume appliance builds.
Recommended
Memory Expansion for OEM Builds
OEM integrators building configurable servers use the M321R6GA0PB0-CWM as the mid-capacity SKU in a memory matrix that spans 24GB, 32GB, 48GB, and 64GB Samsung M321/M324 modules, all sharing the 288-pin RDIMM slot and 5600 MT/s bin. This commonality means one chassis design and BIOS memory map covers every capacity option, cutting validation cost. The part's mass-production status and 40,000+ piece distributor stock (as of Aug 24, 2026, Octopart) secure supply for build-to-order pipelines. Integrators should keep rank organization uniform per channel - pairing the 1Rx4 PB0 with 2Rx8 variants is possible on many platforms but must be validated against the platform QVL.
Recommended
Recommended Products Summary
Engineering reference data for M321R6GA0PB0-CWM β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | M321R6GA3PB0-CWM | M321R4GA3PB0-CWM | M321R8GA0PB0-CWM | M324R2GA3DB0-CWM | M324R4GA3PB0-CWM |
|---|---|---|---|---|---|---|
| Package | 288-pin RDIMM | 288-pin RDIMM - same | 288-pin RDIMM - same | 288-pin RDIMM - same | 288-pin RDIMM - same | 288-pin RDIMM - same |
| Brand | Samsung Electronics | Samsung Electronics | Samsung Electronics | Samsung Electronics | Samsung Electronics | Samsung Electronics |
| Capacity | 48 GB | 48 GB | 32 GB | 64 GB | 64 GB | 32 GB |
| Data Rate | 5600 MT/s | 5600 MT/s | 5600 MT/s | 5600 MT/s | 5600 MT/s | 5600 MT/s |
| Organization / Rank | 1Rx4 (6Gx72) | 2Rx8 | 2Rx8 | 2Rx4 | [DATA_NEEDED] | [DATA_NEEDED] |
| Operating Voltage | 1.1 V | 1.1 V | 1.1 V | 1.1 V | 1.1 V | 1.1 V |
| ECC / Registration | ECC Registered | ECC Registered | ECC Registered | ECC Registered | ECC Registered | ECC Registered |
| Lifecycle Status | Mass Production | Mass Production | Mass Production | Mass Production | Mass Production | Sample |
Key Differentiators
- Single-rank x4 organization for lighter bus load (vs M321R6GA3PB0-CWM)
- Highest capacity density per slot in the 48GB class (vs M321R4GA3PB0-CWM)
- Lower entry cost than 64GB alternatives (vs M321R8GA0PB0-CWM)
Design Notes
Never mix RDIMMs with LRDIMMs or UDIMMs on the same channel, and keep speed bins uniform when populating all channels. Rank organization also matters: the M321R6GA0PB0-CWM is 1Rx4, while M321R6GA3PB0-CWM is 2Rx8. Many platforms accept mixed-rank populations but throttle or derate speed; always validate against the server vendor QVL before deploying a mixed configuration. DDR5 modules use an on-module PMIC, so 1.1V is generated on the DIMM - do not apply motherboard-level voltage offsets designed for DDR4.
Estimated: a 48GB DDR5-5600 RDIMM at 1.1V draws roughly 4-7W under typical server load depending on utilization, versus about 1-2W idle. In a 24-DIMM dual-socket node this contributes on the order of 100-170W to the thermal budget, so memory airflow and VRM sizing on the on-module PMIC path must account for full-population configurations. These figures are engineering estimates from DDR5 platform typical values, not datasheet limits; consult Samsung validation specifications for exact operating currents.
Server boards must follow the JEDEC DDR5 RDIMM routing rules: matched-length fly-by command/address routing to the registering clock driver, and per-subchannel layout for the two independent 40-bit DDR5 subchannels. Handle modules by the edges and use ESD precautions - the on-module PMIC and register do not protect against assembly mishandling. For upgrades, update BIOS/memory reference code to a release that validates 48GB single-rank x4 maps to avoid training failures at 5600 MT/s.
Compliance Information
Compliance data not stated in retrieved distributor listings. Samsung server RDIMMs are typically JEDEC DDR5 compliant per vendor descriptions; consult official Samsung documentation for RoHS/REACH declarations.
