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Green circuit board with black memory chips and gold edge connectors

A-Tech

A-Tech 8GB DDR4 2666MHz ECC UDIMM 1Rx8 Server RAM for Hynix HMA81GU7AFR8N-VK HMA81GU7CJR8N-VK HMA81GU7DJR8N-VK

SKU CH-VW99-6DCTR

8GB DDR4 2666MHz ECC UDIMM server memory module with CL19 latency and 1.2V operation

  • Total capacity8 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL19
  • Rated voltage1.2 V
  • Buffer typeUnbuffered
  • ECC protection guards data integrity in servers
  • DDR4 2666 MHz speed handles demanding workloads
  • 20 V operation reduces power draw
  • 288-pin UDIMM fits standard server slots
  • CL19 latency delivers responsive performance

8GB DDR4 2666MHz ECC UDIMM Server Module

This A-Tech 8GB DDR4 2666MHz ECC UDIMM is a 288-pin server memory module designed to replace Hynix HMA81GU7AFR8N-VK, HMA81GU7CJR8N-VK and HMA81GU7DJR8N-VK parts. It operates at 1.20V with CL19 latency and uses a 1Rx8 unbuffered configuration with major brand chips. The module provides error-correcting code reliability for compatible server and workstation platforms.

Suits ECC UDIMM Slots Only Not Registered Systems

This module suits servers and workstations that require DDR4 2666MHz ECC unbuffered DIMMs in a 1Rx8 layout. It will not work in systems that demand registered or load-reduced memory, nor in platforms limited to non-ECC consumer modules. Buyers needing higher capacities per slot or registered ECC RDIMM support should verify their motherboard specifications before ordering.

1Rx8 ECC Unbuffered Organisation Decides Fit

The single-rank 1Rx8 ECC unbuffered organisation is the specification that determines whether this module installs correctly. Many server boards accept only registered DIMMs or specific rank configurations, so confirming 1Rx8 UDIMM support in the system manual is essential. Without that match the module will not post or will run in a reduced mode.

How it compares

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

Price $91.99
Cheaper than about 72% of the 6,523 comparable items (median $188.99).
Total capacity 8 GB
Lower than about 80% of the 6,064 comparable items (median 32 GB).
Price per GB $11.50 per GB
Pricier than about 71% 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
Total capacity8 GB
Performance
Rated speedDDR4 2666 (PC4 21300)
Processor
ChipsetMajor Brand Chipset
Memory
CAS latencyCL19
ECC supportYes
Buffer typeUnbuffered
Memory rank1Rx8
Power
Rated voltage1.2 V

Questions about this item

How can I confirm the module is running at 2666 MHz with CL19 after installation?

Check the memory speed and CAS latency in your system BIOS or a tool like CPU-Z; they should show DDR4-2666 and CL19 when the module is seated correctly.

What comes in the package and do I need any extra parts to install it?

The box contains one 8 GB DDR4 288-pin UDIMM; no cables, brackets or additional hardware are required for a standard DIMM slot.

Which version should I choose if my server requires a 1Rx8 ECC unbuffered DIMM at 1.2 V?

This single 8 GB 1Rx8 ECC UDIMM matches that exact specification, so select this module for a direct replacement.

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