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Manufacturer: Samsung Last updated: September 11, 2026
Samsung M393A4K40DB3-CWE (32GB DDR4-3200 ECC RDIMM/CL22/2Rx4/1.2V/288-Pin/Registered) Review
The Samsung M393A4K40DB3-CWE is the default spec part in most Dell and HPE server configurations, an OEM-grade registered ECC module that server administrators encounter as factory-standard memory across a huge installed base.
Registered ECC memory in a 2Rx4 configuration built directly by Samsung, offering the same first-party DRAM assurance as Samsung's UDIMM offerings, matched here to the registered-memory requirement of enterprise server platforms. For AMD EPYC and Intel Xeon Scalable servers with explicit RDIMM support, and as an OEM-matching replacement or expansion part for Dell and HPE servers originally shipped with this exact module. Against the SK Hynix HMA84GR7CJR4N-XN, covered elsewhere on this site, both share the same x4 organization and core specification from different first-party DRAM manufacturers. Against the Micron MTA36ASF4G72PZ-3G2R1, also covered elsewhere on this site, all three compete directly in the mainstream 32GB DDR4-3200 RDIMM tier.
ECC and Registered Operation
Registered ECC memory in a 2Rx4 configuration built directly by Samsung, offering the same first-party DRAM assurance as Samsung's UDIMM offerings, matched here to the registered-memory requirement of enterprise server platforms.
Compatibility
For AMD EPYC and Intel Xeon Scalable servers with explicit RDIMM support, and as an OEM-matching replacement or expansion part for Dell and HPE servers originally shipped with this exact module.
Comparison to Sibling Products
Against the SK Hynix HMA84GR7CJR4N-XN, covered elsewhere on this site, both share the same x4 organization and core specification from different first-party DRAM manufacturers. Against the Micron MTA36ASF4G72PZ-3G2R1, also covered elsewhere on this site, all three compete directly in the mainstream 32GB DDR4-3200 RDIMM tier.
Specifications
Identity
| Brand | Samsung |
|---|---|
| Series | Samsung Server |
Memory
| DDR Generation | DDR4 |
|---|---|
| Capacity | 32 GB |
| Speed | 3200 MT/s |
| CAS Latency | 22 |
| Voltage | 1.2 V |
Module and platform
| RAM Segment | Server |
|---|---|
| Pin Count | 288 |
Capacity
| Capacity Per Module | 32 GB |
|---|---|
| Module Count | 1 |
Speed and timings
| True Latency | 13.8 ns |
|---|
Silicon
| ECC | Yes |
|---|
Commercial
| Warranty | Limited Lifetime |
|---|
| Model Number | M393A4K40DB3-CWE |
|---|---|
| Rank Configuration | 2Rx4 (Dual Rank, x4) |
| Registered | Yes (RDIMM) |
| Platform Compatibility | AMD EPYC, Intel Xeon Scalable, OEM Dell/HPE Servers |
| Spec Score | 2.4 |
Expert Review
Reviewed by Burooj Alam. Rated by us, not by users.
Best for
- Server administrators replacing or expanding memory in Dell or HPE servers that shipped with Samsung modules. This part directly matches the factory-original specification in those systems.
Not for
- Not for buyers with no OEM-matching requirement who are comparing purely on price. The Kingston or SK Hynix equivalents, both covered elsewhere on this site, may be more competitively priced.
FAQs
What are the key specifications of the Samsung M393A4K40DB3-CWE (32GB DDR4-3200 ECC RDIMM/CL22/2Rx4/1.2V/288-Pin/Registered)?
The Samsung M393A4K40DB3-CWE (32GB DDR4-3200 ECC RDIMM/CL22/2Rx4/1.2V/288-Pin/Registered) is a memory kit from Samsung. Key specs: DDR Generation DDR4, Capacity 32GB, Kit Configuration 1 x 32GB, Pin Count 288, Speed 3200MHz.
Will the Samsung M393A4K40DB3-CWE (32GB DDR4-3200 ECC RDIMM/CL22/2Rx4/1.2V/288-Pin/Registered) work with my current setup?
The Samsung M393A4K40DB3-CWE (32GB DDR4-3200 ECC RDIMM/CL22/2Rx4/1.2V/288-Pin/Registered) lists DDR Generation is DDR4. 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 M393A4K40DB3-CWE (32GB DDR4-3200 ECC RDIMM/CL22/2Rx4/1.2V/288-Pin/Registered) best suited to?
It suits server administrators replacing or expanding memory in dell or hpe servers that shipped with samsung modules. this part directly matches the factory-original specification in those systems..
What are the drawbacks of the Samsung M393A4K40DB3-CWE (32GB DDR4-3200 ECC RDIMM/CL22/2Rx4/1.2V/288-Pin/Registered)?
It is a poor fit for not for buyers with no oem-matching requirement who are comparing purely on price. the kingston or sk hynix equivalents, both covered elsewhere on this site, may be more competitively priced..
Compare and read more
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