Brand: Samsung | Category: Memory (RAM)
SKU: M321R8GA0BB0-CWM | Part #: M321R8GA0BB0-CWM | MPN: M321R8GA0BB0-CWM
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The Samsung 64GB DDR5-5600 RDIMM ECC Registered (M321R8GA0BB0-CWM) is a high-capacity registered dual in-line memory module engineered for the demands of modern server and workstation platforms. Built on Samsung's advanced DRAM process technology, this module operates at DDR5-5600 MT/s with a 288-pin interface and delivers a 64-bit data bus width with ECC protection via the registered (RCD) buffer architecture. The 1Rx4 single-rank organization using x4 DRAM devices maximizes per-slot density while maintaining signal integrity across multi-slot configurations. On-die ECC (ODECC) inherent to DDR5 adds a first layer of data correction within each DRAM die, complementing the module-level ECC that server platforms rely on for continuous operation.
This module is specifically validated for Intel Xeon Scalable 5th Generation (Emerald Rapids) and AMD EPYC 9004 Series (Genoa/Turin) processors, both of which natively support DDR5 at speeds up to 5600 MT/s per channel. The 2Rx4 64GB configuration enables high-bandwidth, high-capacity memory subsystems when paired across the multiple memory channels present in these dual-socket enterprise platforms. Operating at 1.1V, DDR5's reduced supply voltage compared to DDR4 contributes to improved energy efficiency per gigabyte of capacity, a meaningful factor in high-density rack deployments running memory-intensive workloads around the clock.
As a Samsung original component carrying the M321 server RDIMM product line designation, the M321R8GA0BB0-CWM is suited to large-scale enterprise deployments where memory capacity, bandwidth, and data integrity are non-negotiable. The module's JEDEC-compliant DDR5 RDIMM form factor ensures broad compatibility with server platforms from major brands supporting the standard. High sustained demand across the Emerald Rapids and EPYC Turin install base, combined with the broader industry ramp of DDR5 server infrastructure, has made this capacity point a critical procurement consideration for IT planners building out or refreshing data center memory configurations.
| Manufacturer | Samsung |
| Manufacturer Part Number | M321R8GA0BB0-CWM |
| Module Type | RDIMM (Registered ECC) |
| Capacity | 64GB |
| DDR Generation | DDR5 |
| Speed Grade | DDR5-5600 (5600 MT/s) |
| Form Factor | 288-pin DIMM |
| Data Bus Width | 64-bit (72-bit with ECC) |
| Rank Configuration | 2Rx4 (Dual Rank, x4 organization) |
| Module Voltage | 1.1V |
| ECC Support | ECC Registered (RCD); On-Die ECC (ODECC) per DDR5 specification |
| CAS Latency | CL46 |
| Primary Timings | 46-45-45 |
| Operating Temperature | 0°C to 85°C (standard; RDIMM enterprise specification) |
| Compatibility | Intel Xeon Scalable 5th Gen (Emerald Rapids); AMD EPYC 9004/9005 Series (Genoa/Turin) |
| JEDEC Compliance | JEDEC DDR5 RDIMM standard |
| Launch Quarter | Q4 2023 |
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| Brand | Samsung |
| Category | Memory (RAM) |
| SKU | M321R8GA0BB0-CWM |
| Part Number | M321R8GA0BB0-CWM |
| Condition | New |
| Manufacturer Part Number | M321R8GA0BB0-CWM |
| Module Type | RDIMM (Registered ECC) |
| Capacity | 64GB |
| DDR Generation | DDR5 |
| Speed Grade | DDR5-5600 (5600 MT/s) |
| Form Factor | 288-pin DIMM |
| Data Bus Width | 64-bit (72-bit with ECC) |
| Rank Configuration | 2Rx4 (Dual Rank, x4 organization) |
| Module Voltage | 1.1V |
| ECC Support | ECC Registered (RCD); On-Die ECC (ODECC) per DDR5 specification |
| CAS Latency | CL46 |
| Primary Timings | 46-45-45 |
| Operating Temperature | 0°C to 85°C (standard; RDIMM enterprise specification) |
| Compatibility | Intel Xeon Scalable 5th Gen (Emerald Rapids); AMD EPYC 9004/9005 Series (Genoa/Turin) |
| JEDEC Compliance | JEDEC DDR5 RDIMM standard |
| Launch Quarter | Q4 2023 |