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Green circuit board DDR4 UDIMM module with black memory chips and gold edge connectors

A-Tech

A-Tech 32GB DDR4 2666 ECC UDIMM 2Rx8 Hynix HMAA4GU7AJR8N-VK Server Memory

SKU CH-1HXC-TVD6T

32 GB DDR4 2666 ECC unbuffered DIMM with CL19 latency and 1.2 V operation

  • Total capacity32 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL19
  • Rated voltage1.2 V
  • Buffer typeUnbuffered
  • 32 GB capacity handles heavy server workloads
  • ECC UDIMM protects data integrity in critical applications
  • DDR4 2666 speed delivers responsive multitasking performance
  • 20 V operation reduces power draw and heat
  • 288-pin DIMM fits standard server memory slots

32GB DDR4 2666 ECC UDIMM for servers

This 32GB DDR4 2666 ECC UDIMM module targets server and workstation builds that require error-correcting unbuffered memory. It replaces the Hynix HMAA4GU7AJR8N-VK part and fits standard 288-pin DDR4 DIMM slots. Systems needing registered DIMMs or non-ECC memory cannot use this module.

Thermals noise and power at 1.2V

Operating at the standard DDR4 voltage of 1.20V, the module draws minimal power and generates low heat inside a server chassis. Passive airflow across the DIMM is sufficient for normal workloads, and no active cooling or additional fan headers are required.

CL19 CAS latency at 2666 MT/s

The module runs at DDR4 2666 (PC4-21300) with a CAS latency of 19. This timing figure determines whether the memory matches the platform's supported speed grade and latency requirements for stable operation.

How it compares

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

Price $290.99
Pricier than about 60% of the 6,523 comparable items (median $188.99).
Total capacity 32 GB
Typical for this category: the median of 6,064 items is 32 GB.
Price per GB $9.09 per GB
Pricier than about 63% of the 6,064 comparable items (median $7.25 per GB).

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Specifications

Product
Brand nameA-Tech
Total capacity32 GB
Performance
Rated speedDDR4 2666 (PC4 21300)
Processor
ChipsetMajor Brand Chipset
Memory
CAS latencyCL19
ECC supportYes
Buffer typeUnbuffered
Memory rank2Rx8
Power
Rated voltage1.2 V

Questions about this item

How do I install this 288-pin DDR4 ECC UDIMM in my server, and which step do people often miss?

Power off the system, open the chassis, align the notch on the 288-pin DDR4 module with the slot key, press firmly until both retention clips click, then verify in BIOS that the 32 GB stick is detected at 2666 MHz with ECC active.

What maintenance or replacement will this 32 GB DDR4 2666 ECC UDIMM need over its service life?

No routine maintenance is required; keep air vents clear so the 1.20 V modules stay cool, and replace only if memory diagnostics report uncorrectable ECC errors or the system fails to POST with the module installed.

What is the first limit that appears when this CL19 2Rx8 DDR4 2666 module runs under sustained heavy load?

The CAS latency of 19 cycles at 2666 MHz sets the baseline response time; under continuous workloads the memory controller will hit this timing ceiling before thermal throttling becomes a factor at the standard 1.20 V operating voltage.

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