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Green circuit board with black memory chips, gold edge connector, no heat spreader

SK hynix

SK hynix HMAA8GL7AMR4N-VK 64GB DDR4-2666 CL19 ECC Load Reduced server RAM

SKU CH-2YB3-46P6S MPN HMAA8GL7AMR4N-VK

64GB DDR4-2666 CL19 ECC Load Reduced DIMM enables higher memory density per channel than standard RDIMMs

  • Total capacity64 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL19
  • Rated voltage1.2 V
  • Buffer typeLoad Reduced
  • 64 GB capacity powers dense virtualization and HPC workloads
  • Load Reduced design removes channel rank limits for more DIMMs per channel
  • ECC protection detects and corrects memory errors in mission-critical servers
  • DDR4 2666 at 1.20 V delivers bandwidth with lower power draw
  • 288-pin DIMM with CL19 latency fits standard server memory slots

64 GB DDR4-2666 LRDIMM for dense server builds

This SK hynix module delivers 64 GB of DDR4-2666 memory in a 288-pin load-reduced DIMM. It targets administrators who need to maximise installed capacity on platforms that support LRDIMM technology. The registered buffer and ECC protect data integrity in virtualization, HPC and in-memory database workloads.

Verify LRDIMM support and avoid mixing with UDIMMs

Confirm the motherboard and CPU memory controller accept load-reduced DDR4 modules before ordering. ECC UDIMMs and ECC registered DIMMs cannot be mixed; all existing UDIMMs must be removed if this module is installed. The system must also be a server platform, as these modules are not compatible with standard desktop boards.

Sustained operation at 1.20 V

The load-reduced architecture lowers the electrical load on each channel, allowing more DIMMs per channel while maintaining 2666 MT/s throughput. CAS latency of 19 and 1.20 V operation keep power draw predictable during extended virtualization or big-data runs. No heat spreader is fitted, so chassis airflow must handle the thermal load.

How it compares

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

Price $224.99
Typical for this category: the median of 6,523 items is $188.99.
Total capacity 64 GB
Higher than about 70% of the 6,064 comparable items (median 32 GB).
Price per GB $3.52 per GB
Cheaper than about 85% 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 nameSK hynix
Model nameHMAA8GL7AMR4N-VK
Total capacity64 GB
Product type288-Pin DDR4 SDRAM
Performance
Rated speedDDR4 2666 (PC4 21300)
Processor
ChipsetMajor Brand Chipset
Memory
CAS latencyCL19
ECC supportYes
Buffer typeLoad Reduced
Memory rank4Rx4
Heat spreaderNo
Power
Rated voltage1.2 V

Questions about this item

What comes in the box with this HMAA8GL7AMR4N-VK module and is any extra hardware needed?

The listing supplies the single 64GB 288-pin DDR4 LRDIMM; no cables, brackets or additional components are included and none are required for installation in a compatible server slot.

Should I choose this 64GB LRDIMM or a smaller registered DIMM for my Supermicro single-socket blade?

Pick this 64GB load-reduced module when you need to exceed the per-channel rank limit of standard RDIMMs; it lets you populate more slots per channel for higher total capacity.

What does the 2666 MT/s rating mean once the DIMM is running in a live server?

The module transfers data at 2666 million transfers per second at CL19 latency and 1.20 V, delivering PC4-21300 bandwidth while the load-reduced buffer reduces electrical load on the memory controller.

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