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Green DDR4 RDIMM module with black chips and gold contacts

SAMSUNG

SAMSUNG M393A1G40DB0-CPB 8GB DDR4 2133 ECC Registered 1Rx4 1.2V 288-Pin

SKU CH-SK2Z-XQAPG

ECC registered DDR4 RDIMM for servers with 8 GB capacity, 2133 MHz speed, CL15 latency and 1.2 V operation

  • Total capacity8 GB
  • Rated speedDDR4 2133 (PC4 17000)
  • CAS latencyCL15
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • Memory rank1Rx4
  • ECC protection guards data integrity in server workloads
  • Registered design stabilises signal for multi-module server configurations
  • Single-rank 1Rx4 organisation allows higher density per channel
  • Low 1.20 V operation reduces power draw and heat
  • 288-pin DDR4 form factor fits compatible server DIMM slots

Server-ready DDR4 ECC RDIMM

This 8 GB DDR4 registered module runs at 2133 MT/s with CL15 latency and 1.2 V operation. It uses a 1Rx4 organisation and 288-pin form factor for server and workstation platforms that require ECC protection. The part is validated for system-specific compatibility and is not intended for desktop or laptop PCs.

Thermals noise and power draw

Standard DDR4 voltage of 1.2 V keeps power consumption low for dense server configurations. Registered buffering reduces electrical load on the memory controller, helping maintain signal integrity across populated channels. No active cooling is required on the module itself under normal airflow conditions.

Upgrade path and value

This module replaces a failed or missing stick in qualified server boards that demand registered ECC memory at 2133 speed. The jump is worth it when expanding capacity within the same speed grade or when a platform specifically lists this part number as supported. It does not suit consumer desktop or laptop upgrades.

How it compares

Measured against everything we stock in Model-Specific Memory Upgrades, at today’s prices. Recalculated every night.

Price $48.99
Cheaper than about 78% of the 21,161 comparable items (median $397.99).
Total capacity 8 GB
Lower than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $6.12 per GB
Cheaper than about 64% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameSAMSUNG
Model nameSamsung M393A1G40EB1-CPB
Total capacity8 GB
Product type288-Pin DDR4 SDRAM
Performance
Rated speedDDR4 2133 (PC4 17000)
Memory
CAS latencyCL15
ECC supportYes
Buffer typeRegistered
Memory rank1Rx4
Power
Rated voltage1.2 V
Compatibility
Compatible systemsFor Server, Not For PC

Questions about this item

How do I install this 288-pin DDR4 RDIMM and which step is often missed?

Align the notch with the slot key, press firmly until both latches click, and verify the module is fully seated — partial insertion is the common error that prevents POST.

What maintenance or replacement will this 8GB 1Rx4 module need over time?

No routine maintenance is required; if errors appear, run a memory diagnostic and replace the individual stick if it fails, since ECC corrects single-bit faults but cannot repair a defective chip.

What limit appears first when this CL15 1.20V registered memory runs under sustained load?

The registered buffer adds one cycle of latency, so sustained throughput is capped by the 2133 MT/s data rate and CL15 timing rather than thermal or voltage headroom.

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