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Manufacturer: Samsung Last updated: September 11, 2026
Samsung M321R4GA3BB6-CQK (32GB DDR5-4800 ECC RDIMM/CL40/2Rx8/1.1V/288-Pin/Registered) Review
The Samsung M321R4GA3BB6-CQK is the default spec part across most current Dell, HPE, and Lenovo server configurations built on the newest generation of EPYC and Xeon platforms, an OEM-grade DDR5 registered ECC module from a first-party DRAM manufacturer.
Registered ECC memory in a DDR5 dual-rank configuration, the memory type required by current-generation AMD EPYC Genoa/Turin and Intel Xeon Sapphire/Emerald Rapids server platforms. For AMD EPYC Genoa/Turin and Intel Xeon Sapphire/Emerald Rapids servers with explicit DDR5 RDIMM support, and as an OEM-matching part for Dell, HPE, and Lenovo servers originally shipped with this module. Against the Supermicro (Micron) MEM-DR532L-SL01-ER56, covered elsewhere on this site, both target current-generation EPYC and Xeon Scalable servers, with this Samsung module being the more common factory-fit part in Dell/HPE/Lenovo configurations specifically. Against the SK Hynix HMCG78MEBRA, also covered elsewhere on this site, that module offers a smaller 16GB capacity at single-rank organization.
ECC and Registered Operation
Registered ECC memory in a DDR5 dual-rank configuration, the memory type required by current-generation AMD EPYC Genoa/Turin and Intel Xeon Sapphire/Emerald Rapids server platforms.
Compatibility
For AMD EPYC Genoa/Turin and Intel Xeon Sapphire/Emerald Rapids servers with explicit DDR5 RDIMM support, and as an OEM-matching part for Dell, HPE, and Lenovo servers originally shipped with this module.
Comparison to Sibling Products
Against the Supermicro (Micron) MEM-DR532L-SL01-ER56, covered elsewhere on this site, both target current-generation EPYC and Xeon Scalable servers, with this Samsung module being the more common factory-fit part in Dell/HPE/Lenovo configurations specifically. Against the SK Hynix HMCG78MEBRA, also covered elsewhere on this site, that module offers a smaller 16GB capacity at single-rank organization.
Specifications
Identity
| Brand | Samsung |
|---|---|
| Series | Samsung Server |
Memory
| DDR Generation | DDR5 |
|---|---|
| Capacity | 32 GB |
| Speed | 4800 MT/s |
| CAS Latency | 40 |
| Voltage | 1.1 V |
Module and platform
| RAM Segment | Server |
|---|---|
| Pin Count | 288 |
Capacity
| Capacity Per Module | 32 GB |
|---|---|
| Module Count | 1 |
Speed and timings
| True Latency | 16.7 ns |
|---|
Silicon
| ECC | Yes |
|---|
Commercial
| Warranty | Limited Lifetime |
|---|
| Model Number | M321R4GA3BB6-CQK |
|---|---|
| Rank Configuration | 2Rx8 (Dual Rank, x8) |
| Registered | Yes (RDIMM) |
| Platform Compatibility | AMD EPYC Genoa/Turin, Intel Xeon Sapphire/Emerald Rapids |
| Spec Score | 1.8 |
Expert Review
Reviewed by Burooj Alam. Rated by us, not by users.
Best for
- Server administrators replacing or expanding memory in current-generation Dell, HPE, or Lenovo servers built with Samsung DDR5 RDIMMs. This part directly matches the factory-original specification in those systems.
Not for
- Not for Supermicro-built servers requiring Supermicro-certified compatibility. The Supermicro MEM-DR532L-SL01-ER56, covered elsewhere on this site, is the appropriate certified part for those boards.
FAQs
What are the key specifications of the Samsung M321R4GA3BB6-CQK (32GB DDR5-4800 ECC RDIMM/CL40/2Rx8/1.1V/288-Pin/Registered)?
The Samsung M321R4GA3BB6-CQK (32GB DDR5-4800 ECC RDIMM/CL40/2Rx8/1.1V/288-Pin/Registered) is a memory kit from Samsung. Key specs: DDR Generation DDR5, Capacity 32GB, Kit Configuration 1 x 32GB, Pin Count 288, Speed 4800MHz.
Will the Samsung M321R4GA3BB6-CQK (32GB DDR5-4800 ECC RDIMM/CL40/2Rx8/1.1V/288-Pin/Registered) work with my current setup?
The Samsung M321R4GA3BB6-CQK (32GB DDR5-4800 ECC RDIMM/CL40/2Rx8/1.1V/288-Pin/Registered) lists DDR Generation is DDR5. Check that against the hardware you already own before buying, since this is the field that most often decides whether a part fits. Our upgrade checker at /upgrade can confirm compatibility for common combinations.
Who is the Samsung M321R4GA3BB6-CQK (32GB DDR5-4800 ECC RDIMM/CL40/2Rx8/1.1V/288-Pin/Registered) best suited to?
It suits server administrators replacing or expanding memory in current-generation dell, hpe, or lenovo servers built with samsung ddr5 rdimms. this part directly matches the factory-original specification in those systems..
What are the drawbacks of the Samsung M321R4GA3BB6-CQK (32GB DDR5-4800 ECC RDIMM/CL40/2Rx8/1.1V/288-Pin/Registered)?
It is a poor fit for not for supermicro-built servers requiring supermicro-certified compatibility. the supermicro mem-dr532l-sl01-er56, covered elsewhere on this site, is the appropriate certified part for those boards..
Compare and read more
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