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Green rectangular DDR4 DIMM with black chips on both sides, gold contacts along bottom edge, no heat spreader

A-Tech

A-Tech 32GB DDR4 2666MHz CL19 Desktop RAM

SKU CH-X0CW-RYR87

A 32GB DDR4 2666MHz CL19 desktop DIMM with 288 pins, 1.2V operation, and unbuffered non-ECC design for compatible system upgrades

  • Total capacity32 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL19
  • Tested speed2666
  • Rated voltage1.2 V
  • 32 GB capacity lets you run more apps at once
  • DDR4 2666 MHz speed moves data quickly through the system
  • CL19 latency keeps response times tight
  • 20 V standard voltage reduces power draw
  • 288-pin DIMM fits desktop memory slots

32GB DDR4 Desktop Memory

This 32GB DDR4 DIMM is an unbuffered, non-ECC module built as a compatible replacement for the Hynix HMAA4GU6MJR8N-VK part. It targets desktop systems that require a single high-density stick to expand memory capacity without populating multiple slots.

Capacity and headroom

The 32GB capacity provides ample headroom for heavy multitasking, large datasets, and memory-intensive applications on supported platforms. Systems limited to lower maximum densities per slot or lower total memory ceilings will not be able to utilise the full module.

DDR4 2666MHz interface limits

The module operates at 2666MHz with CL19 latency and 1.20V voltage on the standard DDR4 288-pin interface. Platforms that only support lower DDR4 data rates will downclock the module, while boards requiring registered or ECC memory cannot use this unbuffered DIMM.

How it compares

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

Price $171.99
Pricier than about 64% of the 3,647 comparable items (median $90.99).
Total capacity 32 GB
Higher than about 70% of the 3,251 comparable items (median 16 GB).
Price per GB $5.37 per GB
Cheaper than about 67% of the 3,251 comparable items (median $6.75 per GB).

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Specifications

Product
Brand nameA-Tech
Product lineCompatible Replacement for Hynix
Model nameHMAA4GU6MJR8N-VK
Total capacity32 GB
Performance
Rated speedDDR4 2666 (PC4 21300)
Processor
ChipsetMajor Brand Chipset
Memory
CAS latencyCL19
Tested speed2666
ECC supportNo
Buffer typeUnbuffered
Heat spreaderNo
Power
Rated voltage1.2 V
Compatibility
Recommended forCompatible Replacement for Hynix HMAA4GU6MJR8N-VK

Questions about this item

Will this 32GB stick work alongside my existing 8GB modules?

Yes, provided your motherboard supports mixed capacities and you install the modules in the correct slots for your board's channel layout.

My board has four slots — can I add this module without removing the ones already installed?

You can keep the existing modules if a free 288-pin DDR4 slot is available and the total capacity does not exceed your CPU or chipset limit.

Does the CL19 timing require any manual BIOS adjustment to run at 2666MHz?

The module is rated for 2666MHz at CL19 with standard 1.20V operation; most systems will apply these settings automatically on first boot.

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