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Green bare circuit board with gold edge connector and black memory chips, 288-pin DDR5 RDIMM

A-Tech

A-Tech 128GB DDR5 6400MHz ECC RDIMM 2Rx4 Server RAM

SKU CH-K3AP-NB92P

A 128GB DDR5 6400MHz ECC RDIMM module with 2Rx4 rank, CAS 32 latency and 1.1V operation for server workloads

  • Total capacity128 GB
  • Rated speedDDR5 6400 (PC5 51200)
  • ChipsetSamsung Chipset
  • CAS latency32
  • Rated voltage1.1 V
  • Buffer typeRegistered
  • 128GB capacity handles heavy server workloads
  • DDR5 6400 speed delivers high data throughput
  • ECC registered design protects data integrity
  • 1V operation matches DDR5 standard voltage
  • Samsung chipset ensures component reliability

A-Tech 128GB DDR5 6400MHz ECC RDIMM

This A-Tech module provides 128GB of DDR5 registered ECC memory for server and workstation platforms. It operates at 6400MHz with a CAS latency of 32 and runs at the standard 1.1V. The 288-pin RDIMM uses Samsung chipset components in a 2Rx4 configuration without a heat spreader.

Suited for DDR5 servers needing registered ECC

This module fits systems that require DDR5 RDIMM modules with ECC error correction and registered buffering. Builders whose platforms only accept unbuffered UDIMMs or non-ECC memory cannot use this part. It is also unsuitable for any board limited to earlier DDR generations or a different pin count.

The registered ECC RDIMM form factor decides

The module is a 288-pin DDR5 RDIMM with on-board register and ECC circuitry; the motherboard must explicitly support registered ECC DIMMs. Verify the system manual for DDR5 RDIMM qualification, supported ranks, and channel population rules before purchase.

How it compares

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

Price $3,990.99
Pricier than about 90% of the 6,523 comparable items (median $188.99).
Total capacity 128 GB
Higher than about 90% of the 6,064 comparable items (median 32 GB).
CAS latency 32
Lower than about 74% of the 439 comparable items (median 40).
Price per GB $31.18 per GB
Pricier than about 90% 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 M321RAJA0MB2-CCP
Model nameA-Tech 128 GB DDR5-6400 ECC RDIMM Server RAM Module
Total capacity128 GB
Product type288-Pin DDR5 RDIMM
Performance
Rated speedDDR5 6400 (PC5 51200)
Processor
ChipsetSamsung Chipset
Memory
CAS latency32
ECC supportYes
Buffer typeRegistered
Memory rank2Rx4
Heat spreaderNo
Power
Rated voltage1.1 V

Questions about this item

What is the CAS latency of this 128GB DDR5 6400MHz ECC RDIMM module?

The module runs at CAS latency 32, which is the standard timing for DDR5-6400 registered memory.

How much power does the module draw and does it generate much heat during continuous server workloads?

Operating at 1.10V with no heat spreader, it uses the standard DDR5 voltage; registered buffering keeps signal integrity stable under sustained load.

Which motherboard slot and chipset support are needed for this 288-pin RDIMM to function?

It requires a DDR5 RDIMM slot on a server or workstation board that supports 2Rx4 registered ECC modules and Samsung DRAM chipsets.

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