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Green printed circuit board with black memory chips and gold edge connectors

A-Tech

A-Tech 16GB DDR4 2666 ECC UDIMM 2Rx8 Server RAM

SKU CH-JCK3-QXA6B

16 GB DDR4 2666 ECC UDIMM module with CL19 latency, 1.20 V operation and 2Rx8 rank for server upgrades

  • Total capacity16 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL19
  • Rated voltage1.2 V
  • Buffer typeUnbuffered
  • 16 GB DDR4 2666 ECC UDIMM for server workloads
  • CL19 latency at 1.2 V for stable operation
  • 2Rx8 dual-rank organisation increases memory density
  • 288-pin DIMM fits standard DDR4 server slots
  • Tested replacement for Hynix HMA82GU7DJR8N-VK

16 GB DDR4 ECC UDIMM for servers

This 16 GB DDR4 2666 module adds error-correcting capacity to compatible server and workstation boards. It runs at CL19 latency and 1.20 V, matching standard DDR4 voltage. The unbuffered design suits platforms that accept UDIMM memory.

288-pin DIMM fits standard DDR4 slots

The single-rank 2Rx8 module installs in any DDR4 UDIMM slot without registered-buffer overhead. It frees registered DIMM slots for other configurations and keeps the memory bus unbuffered for lower latency. Verify your system supports unbuffered ECC before ordering.

Low-voltage operation limits heat and noise

At 1.20 V the module draws minimal power, reducing thermal load inside dense chassis. Passive cooling from case airflow is typically sufficient, keeping acoustic impact negligible during sustained workloads.

How it compares

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

Price $145.99
Cheaper than about 57% 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 $9.12 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
Product lineCompatible Replacement for Hynix
Model nameHMA82GU7DJR8N-VK
Total capacity16 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

Does the CL19 latency become a bottleneck when the module runs at 2666 MHz for long periods?

CL19 is the rated timing at 2666 MHz; sustained workloads stay within this specification.

How much heat does the 1.20 V unbuffered DIMM produce during all-day server operation?

Standard DDR4 1.20 V unbuffered modules run cool enough for typical server chassis airflow.

Which motherboard slot and chipset support are required for this 288-pin 2Rx8 ECC UDIMM?

A DDR4 288-pin UDIMM slot with ECC support in the chipset is needed.

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