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Green rectangular circuit board with black memory chips on both sides and gold edge connectors

SK hynix

SK hynix HMAA8GL7AMR4N-VK 64GB DDR4-2666 ECC LRDIMM SuperStorage server RAM

SKU CH-TMXE-T679S MPN HMAA8GL7AMR4N-VK

64 GB DDR4-2666 ECC load-reduced DIMM removes channel rank limits so more modules fit per channel for higher density

  • Capacity64GB
  • Type288-Pin DDR4 SDRAM
  • SpeedDDR4 2666 (PC4 21300)
  • CAS LatencyCL19
  • Voltage1.20V
  • ECCYes
  • 64 GB capacity supports dense virtualization and in-memory databases
  • Load Reduced design removes channel ranking limits for more DIMMs per channel
  • DDR4 2666 speed delivers 21300 MB/s bandwidth for demanding workloads
  • ECC and CL19 latency protect data integrity in critical server tasks
  • 20 V operation reduces power draw compared to standard registered DIMMs

High-density LRDIMM for SuperStorage servers

This 64 GB DDR4-2666 ECC Load Reduced DIMM is built for Supermicro SuperStorage platforms that need maximum memory capacity per channel. The 4Rx4 organisation and LRDIMM buffer remove the ranking limits of standard RDIMMs, letting you populate more slots per channel. It runs at 1.20 V with CL19 latency and is sold new for server deployments only.

64 GB capacity with room for 128 GB modules

Each module delivers 64 GB using 16 Gb-based components, and the platform supports densities up to 128 GB per DIMM when the same technology is used. The LRDIMM design provides more memory bandwidth than standard RDIMMs while staying more energy efficient. Speed is rated at 2666 MT/s (PC4 21300); the platform can scale to 3200 MT/s with faster modules, but this kit operates at the specified 2666 rate.

No heat spreader and no desktop compatibility

The module ships without a heat spreader, relying on server chassis airflow for cooling. It cannot be mixed with ECC UDIMMs — if a system shipped with UDIMMs, all existing modules must be removed before installing these LRDIMMs. No software or additional accessories are included; the change is purely the ability to reach higher installed capacities for virtualization, HPC and in-memory database workloads.

Highlights

  • 64 GB capacity supports dense virtualization and in-memory databases
  • Load Reduced design removes channel ranking limits for more DIMMs per channel
  • DDR4 2666 speed delivers 21300 MB/s bandwidth for demanding workloads
  • ECC and CL19 latency protect data integrity in critical server tasks
  • 20 V operation reduces power draw compared to standard registered DIMMs

Specifications

BrandSK hynix
ModelHMAA8GL7AMR4N-VK
Capacity64GB
Type288-Pin DDR4 SDRAM
SpeedDDR4 2666 (PC4 21300)
CAS LatencyCL19
Voltage1.20V
ECCYes
Buffered/RegisteredLoad Reduced
Rank4Rx4
ChipsetMajor Brand Chipset
Heat SpreaderNo
FeaturesEliminate channel ranking limitations associated with standard RDIMMs
Enable more installed DIMMs per channel for greater memory density
More memory bandwidth than standard RDIMMs
More energy efficient than standard RDIMMs
100% component and module tested to mission-critical server standards
Compatible with OEM servers and warranties
Optimized for Intel Xeon processor product families

Questions about this item

Will these 64GB DDR4-2666 LRDIMMs work in the same channels as my existing standard RDIMMs?

No, LRDIMMs and standard RDIMMs cannot be mixed in the same channel. The supplier notes that if your system currently uses ECC UDIMMs, all existing modules must be removed before installing these registered LRDIMMs.

How can I verify the modules are running at the rated DDR4-2666 speed and CL19 latency after installation?

Enter the server BIOS or UEFI and check the memory configuration screen; it should report 2666 MT/s (PC4-21300) and CAS latency 19 for each installed 64GB module.

Does the box contain only the 64GB module or are heat spreaders and additional hardware included?

The module ships without a heat spreader; the package contains the 288-pin DDR4 LRDIMM only. Any required cooling or mounting hardware must be sourced separately.

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