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Green DDR5 server DIMM with black chips and silver label

A-Tech

A-Tech 64GB DDR5 4800 ECC RDIMM 2Rx4 Samsung M321R8GA0BB0-CQK Server Memory

SKU CH-XA6X-P5T7E

A 64 GB DDR5 4800 ECC registered DIMM with Samsung chipset, CL40 latency and 1.1 V operation

  • Total capacity64 GB
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetSamsung Chipset
  • CAS latencyCL40
  • Rated voltage1.1 V
  • Buffer typeRegistered
  • 64 GB capacity handles heavy server workloads
  • DDR5 4800 speed delivers high bandwidth
  • ECC registered design protects data integrity
  • 10 V operation reduces power draw
  • Samsung 2Rx4 chipset ensures reliable performance

Capacity and purpose

This 64GB DDR5 registered ECC DIMM is built for servers and workstations that require error correction and signal buffering. The 2Rx4 organisation and Samsung chipset provide the density and stability expected in multi-socket platforms. It is not suited for consumer desktops or laptops that accept only unbuffered non-ECC memory. Builders who need unregistered modules or lower capacities should select a different product.

Sustained workload behaviour

Rated at 4800 MT/s with a CL40 latency and 1.10V operation, the module maintains its rated throughput during extended compute runs thanks to the registered interface reducing electrical load on the memory controller. ECC circuitry detects and corrects single-bit errors on the fly, preventing silent data corruption during long-running jobs. Workloads that exceed the single-module capacity or require higher frequencies will need additional DIMMs or faster-rated parts.

Build and connectivity

The stick uses a 288-pin DDR5 DIMM form factor with a 262-pin contact layout as specified by the Samsung M321R8GA0BB0-CQK reference design. Registered signalling and on-module voltage regulation contribute to reliable insertion and stable operation in qualified server chassis. Systems that lack DDR5 RDIMM slots or that require a different pin count cannot accept this module.

How it compares

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

Price $1,636.99
Pricier than about 84% of the 6,523 comparable items (median $188.99).
Total capacity 64 GB
Higher than about 70% of the 6,064 comparable items (median 32 GB).
Price per GB $25.58 per GB
Pricier than about 87% of the 6,064 comparable items (median $7.25 per GB).

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Specifications

Product
Brand nameA-Tech
Product lineCompatible Replacement for Samsung
Model nameM321R8GA0BB0-CQK
Total capacity64 GB
Performance
Rated speedDDR5 4800 (PC5 38400)
Processor
ChipsetSamsung Chipset
Memory
CAS latencyCL40
ECC supportYes
Buffer typeRegistered
Memory rank2Rx4 (EC8)
Power
Rated voltage1.1 V

Questions about this item

How much power does the 1.10V DDR5 4800 module draw when the server runs continuously?

The module operates at the standard DDR5 voltage of 1.10V; actual power draw depends on your platform's memory controller and workload, so consult the system vendor's specifications for sustained-load figures.

What motherboard slot and memory controller features are required for this 288-pin 2Rx4 ECC RDIMM to function?

You need a DDR5-compatible server or workstation motherboard with a 288-pin RDIMM slot, registered-DIMM support and ECC capability; the memory controller must also accept 2Rx4 organisation at 4800 MT/s.

Can this CL40 4800 MT/s DDR5 RDIMM share a channel with slower DDR5 modules already installed in my system?

Mixing modules of different speeds or latencies on the same channel forces the memory controller to run all modules at the lowest common speed and loosest timings, so the 4800 MT/s CL40 module will downclock to match the slower kit.

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