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Green rectangular DDR4 server memory module with gold edge contacts and black DRAM chips, no heat spreader

SK hynix

SK hynix HMAA8GL7AMR4N-VK 64GB DDR4-2666 CL19 Load Reduced server RAM for Intel S2600WT

SKU CH-MGHP-3Q2GJ MPN HMAA8GL7AMR4N-VK

A 64GB DDR4-2666 CL19 Load Reduced DIMM that overcomes standard RDIMM channel limits to fit more modules per slot for higher server density

  • Total capacity64 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL19
  • Rated voltage1.2 V
  • Buffer typeLoad Reduced
  • 64 GB capacity powers virtualization and in-memory databases
  • Load Reduced design allows more DIMMs per channel for higher density
  • DDR4 2666 speed delivers 21300 MT/s bandwidth
  • ECC and CL19 latency protect data integrity in servers
  • 20 V operation reduces power draw versus standard RDIMMs

64 GB Load-Reduced DDR4-2666 for Intel S2600WT

This 64 GB SK hynix LRDIMM runs at DDR4-2666 (PC4-21300) with CL19 latency and 1.20 V operation. It carries ECC and a 4Rx4 organisation on a 288-pin form factor. The module is designed for Intel S2600WT server platforms that require registered memory.

Sustained-load behaviour

Load-Reduced architecture buffers the command, address and data signals to reduce electrical load on the memory controller. This allows more DIMMs per channel than standard RDIMMs while maintaining signal integrity at 2666 MT/s. The design targets virtualization, HPC and in-memory database workloads that keep all channels populated under continuous demand.

DDR4 density ceiling

DDR4 LRDIMM technology supports module densities up to 128 GB, so this 64 GB stick leaves headroom for future expansion within the same standard. The four-rank layout already uses 16 Gb components to reach its capacity. Systems limited to lower-density RDIMMs cannot reach the same total memory footprint per socket.

How it compares

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

Price $232.99
Pricier than about 54% of the 6,523 comparable items (median $188.99).
Total capacity 64 GB
Higher than about 70% of the 6,064 comparable items (median 32 GB).
Price per GB $3.64 per GB
Cheaper than about 84% of the 6,064 comparable items (median $7.25 per GB).

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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

How much power does the 1.20V 64GB LRDIMM draw when the server runs all day?

The module operates at 1.20V DDR4 standard voltage; load-reduced architecture reduces electrical load per channel compared with standard RDIMMs, improving energy efficiency during continuous operation.

What motherboard slot and chipset support are required to install this 288-pin DDR4-2666 LRDIMM?

A 288-pin DDR4 slot with LRDIMM support and a platform qualified for PC4-21300 CL19 4Rx4 modules, such as the Intel S2600WT, is required for correct operation.

Can I keep my existing ECC UDIMMs and add this CL19 4Rx4 LRDIMM to the same server?

No — ECC UDIMMs and ECC registered or load-reduced DIMMs cannot be mixed; all existing UDIMMs must be removed before installing this module.

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