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Green printed circuit board with black memory chips and gold edge connectors, 288-pin DDR5 RDIMM module

A-Tech

A-Tech 16GB DDR5 4800 ECC RDIMM 1Rx8 Samsung Replacement

SKU CH-NJHX-127MH

16 GB DDR5 4800 ECC registered server DIMM with Samsung chips, CL40 latency and 1.1 V operation

  • Total capacity16 GB
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetSamsung Chipset
  • CAS latencyCL40
  • Rated voltage1.1 V
  • Buffer typeRegistered
  • 16 GB DDR5 4800 registered ECC module expands server memory capacity
  • CL40 latency at 1.10 V delivers stable registered performance
  • Single-rank 1Rx8 Samsung chipset ensures reliable data integrity
  • 288-pin DDR5 DIMM form factor fits compatible server slots
  • Direct replacement for Samsung M321R2GA3BB0-CQK simplifies upgrade path

Server DDR5 upgrade

This 16 GB registered ECC module replaces the Samsung M321R2GA3BB0-CQK in DDR5 server and workstation platforms. It runs at 4800 MHz with CL40 latency at the standard 1.10 V. The single-rank 1Rx8 organisation uses Samsung silicon for validated reliability.

Fits registered DDR5 slots

The 288-pin DIMM installs only in systems that support registered ECC DDR5 memory and cannot be used in consumer desktop boards. It requires a compatible server or workstation motherboard with registered DIMM slots. The module frees non-ECC slots for other configurations.

16 GB single-module capacity

One module adds 16 GB of error-correcting memory for virtualisation, database or compute workloads. The single-rank design leaves additional DIMM channels open for further expansion. Systems needing larger per-slot density or higher speeds will require different modules.

How it compares

Measured against everything we stock in ECC Server RAM, at today’s prices. Recalculated every night.

Price $395.99
Pricier than about 66% of the 6,523 comparable items (median $188.99).
Total capacity 16 GB
Lower than about 60% of the 6,064 comparable items (median 32 GB).
Price per GB $24.75 per GB
Pricier than about 86% of the 6,064 comparable items (median $7.25 per GB).

New to this? Buying memory and SSDs with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameA-Tech
Product lineCompatible Replacement for Samsung
Model nameM321R2GA3BB0-CQK
Total capacity16 GB
Performance
Rated speedDDR5 4800 (PC5 38400)
Processor
ChipsetSamsung Chipset
Memory
CAS latencyCL40
ECC supportYes
Buffer typeRegistered
Memory rank1Rx8 (EC8)
Power
Rated voltage1.1 V

Questions about this item

What is the CAS latency limit that appears first under sustained workloads?

The module runs at CL40, so that timing becomes the bottleneck during heavy continuous use.

How much heat and power does the 1.10V DDR5 4800 registered DIMM produce when running all day?

Operating at the standard 1.10V DDR5 voltage, it draws minimal power and generates low heat in a server chassis.

Which motherboard slot and chipset must I already have for this 288-pin DDR5 RDIMM to work?

You need a DDR5-compatible server board with a 288-pin RDIMM slot and a chipset that supports registered ECC memory.

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