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Samsung M393A2K43DB3-CWE 16GB DDR4-3200 ECC registered RDIMM server memory module
Samsung

Samsung M393A2K43DB3-CWE

Expert rating8 / 10

View on NeweggView on semiconductor.samsung.com
Capacity:
16GB
Speed:
3200MT/s
ECC:
Yes
Form Factor:
RDIMM

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Disclaimer: The price and specification of the given product may differ from the actual product. Please confirm on the retailer's website before buying.

Manufacturer: Samsung Last updated: 2026-09-12

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Samsung M393A2K43DB3-CWE Review

If you're cross-referencing a Dell, HPE, or Lenovo server's compatible memory list and landed on Samsung M393A2K43DB3-CWE, this is a genuine Samsung 16GB DDR4-3200 ECC Registered DIMM built for exactly that kind of server or workstation slot.

This is OEM server memory, not a gaming kit, no RGB, no fancy heat spreader, just a 2Rx8 dual-rank registered module that Samsung ships to system integrators and that's widely resold as the exact replacement part for Dell PowerEdge, HPE ProLiant, and Lenovo ThinkSystem servers running 1st/2nd-gen Xeon Scalable or EPYC 7002-series platforms.

Server Compatibility

3200MT/s DDR4 RDIMM is the standard memory speed for Cascade Lake Xeon Scalable and 2nd-gen EPYC platforms; always confirm your motherboard or server chassis officially supports RDIMM (not just UDIMM) before ordering, mixing DIMM types is not supported.

Comparison to Alternatives

Against SK hynix's HMA82GU7DJR8N-XN (16GB, DDR4-3200, ECC UDIMM, already in this catalog), that's an unbuffered module for workstations without a memory buffer chip, while this Samsung part is registered (RDIMM) for full rack servers, they are not interchangeable despite the similar capacity and speed. Against Samsung's own M391A4G43BB1-CWE (32GB UDIMM), this is the smaller-capacity registered sibling for genuine server chassis rather than a workstation tower.

Our verdict

Reviewed by Burooj Alam. Rated by us, not by users.

Expert rating8 / 10

Genuine OEM Samsung server memory at a fair price, the correct choice specifically for RDIMM-only server motherboards, not for a desktop or workstation UDIMM slot.

Best for

  • Dell PowerEdge, HPE ProLiant, and Lenovo ThinkSystem server memory upgrades
  • 2nd-gen Xeon Scalable and EPYC 7002-series RDIMM slots
  • IT admins replacing failed ECC modules with an exact-spec part

Not for

  • Consumer desktop or gaming motherboards (RDIMM is not supported on most consumer boards)
  • Workstations that specifically require UDIMM, not RDIMM
  • Anyone wanting RGB or overclocking headroom

Specifications

What these specs mean

Identity

Peak Bandwidth25.6 GB/s
BrandSamsung
Part NumberM393A2K43DB3-CWE
SeriesSamsung Server Memory

Memory

DDR GenerationDDR4
Capacity16 GB
Speed3200MT/s (PC4-25600)
CAS Latency22
Module Count1
Voltage1.2 V

Physical

Form FactorDesktop DIMM
RGB LightingNo

Module and platform

RAM SegmentServer

Capacity

Capacity Per Module16 GB

Speed and timings

True Latency13.8 ns

Silicon

ECCYes

Physical and lighting

ColourGreen

Commercial

WarrantyLimited Lifetime

FAQs

What are the key specifications of the Samsung M393A2K43DB3-CWE (16GB DDR4-3200 ECC RDIMM/CL22/2Rx8/1.2V/288-Pin/Registered)?

The Samsung M393A2K43DB3-CWE (16GB DDR4-3200 ECC RDIMM/CL22/2Rx8/1.2V/288-Pin/Registered) is a memory kit from Samsung. Key specs: DDR Generation DDR4, Capacity 16GB, Module Count 1, Speed 3200MT/s (PC4-25600), CAS Latency 22.

Will the Samsung M393A2K43DB3-CWE (16GB DDR4-3200 ECC RDIMM/CL22/2Rx8/1.2V/288-Pin/Registered) work with my current setup?

The Samsung M393A2K43DB3-CWE (16GB DDR4-3200 ECC RDIMM/CL22/2Rx8/1.2V/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 M393A2K43DB3-CWE (16GB DDR4-3200 ECC RDIMM/CL22/2Rx8/1.2V/288-Pin/Registered) best suited to?

Best suited to: Dell PowerEdge, HPE ProLiant, and Lenovo ThinkSystem server memory upgrades; 2nd-gen Xeon Scalable and EPYC 7002-series RDIMM slots; IT admins replacing failed ECC modules with an exact-spec part.

What are the drawbacks of the Samsung M393A2K43DB3-CWE (16GB DDR4-3200 ECC RDIMM/CL22/2Rx8/1.2V/288-Pin/Registered)?

Not the best fit for: Consumer desktop or gaming motherboards (RDIMM is not supported on most consumer boards); Workstations that specifically require UDIMM, not RDIMM; Anyone wanting RGB or overclocking headroom.

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