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Green 288-pin DDR4 RDIMM module with black chips and gold contacts

A-Tech

A-Tech 16GB DDR4 2666MHz ECC RDIMM 2Rx8 CL19 server RAM

SKU CH-26WN-E4QQM

16 GB DDR4 2666 MHz ECC registered DIMM with CL19 latency for server upgrades

  • Total capacity16 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL19
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • ECC protection prevents data corruption in critical workloads
  • Registered design stabilises signal integrity for dense server configurations
  • 16 GB capacity expands multitasking headroom for virtualisation
  • DDR4 2666 MHz speed delivers high throughput at 1.2 V
  • 288-pin RDIMM form factor fits standard server memory slots

What this module is and who it suits

This A-Tech 16GB DDR4 2666MHz ECC RDIMM uses registered 2Rx8 organisation and CL19 timing at 1.20V. It targets server and workstation owners who need error-correcting memory for data integrity in multi-tasking or virtualised workloads.

Verify your platform before ordering

Confirm that your motherboard accepts DDR4 288-pin registered DIMMs and supports ECC operation at 2666MHz. Check the system’s qualified-vendor list against the HP part numbers listed to ensure the module will be recognised and run at the rated speed.

What the bundle changes for you

The single 16GB stick lets you add capacity in one-slot increments without populating channels in pairs. Major-brand chips and factory testing aim to reduce early failures, while the lifetime warranty and US-based support provide a direct path for replacement if a module proves defective.

How it compares

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

Price $139.99
Cheaper than about 58% 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 $8.75 per GB
Pricier than about 62% 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 capacity16 GB
Performance
Rated speedDDR4 2666 (PC4 21300)
Processor
ChipsetMajor Brand Chipset
Memory
CAS latencyCL19
ECC supportYes
Buffer typeRegistered
Memory rank2Rx8
Power
Rated voltage1.2 V

Questions about this item

Does the module ship alone or as part of a kit with cables or a heat spreader?

The listing shows one 16GB DDR4 2666MHz ECC RDIMM 2Rx8 module; no extra cables, brackets or cooling accessories are included

Should I pick the 16GB CL19 registered stick or a different capacity for my HP server?

This part matches HP part numbers 835955-H21, 840756-091, 840756-V91, 868846-001, 870840-001, P02890-B21, P05588-B21, P07029-B21, P08274-001 and Q2D31A — choose it when your service manual calls for any of those codes

What does the 2666MHz CL19 rating mean once the DIMM is installed in a compatible server?

The module runs at DDR4 2666 MT/s with a CAS latency of 19 cycles at the standard 1.2V, delivering registered ECC stability for supported HP server and workstation platforms

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