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Green bare circuit board with 288 gold contacts, black DRAM chips on both sides, no heat spreader

SK hynix

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

SKU CH-TNPM-NC73Q MPN HMAA8GL7AMR4N-VK

64 GB load-reduced DDR4-2666 ECC module removes channel rank limits so servers can fit more DIMMs per channel at 1.20 V

  • Total capacity64 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL19
  • Rated voltage1.2 V
  • Buffer typeLoad Reduced
  • 64GB capacity supports large virtualisation workloads
  • Load Reduced design removes channel rank limits for higher density
  • DDR4-2666 speed delivers 21300 MT/s bandwidth
  • ECC protection corrects single-bit errors automatically
  • 20V operation reduces server power draw

64 GB Load-Reduced DDR4-2666 Server Memory

This 64 GB DDR4-2666 module uses a 288-pin Load Reduced DIMM form factor with ECC and a 4Rx4 rank configuration. It operates at 1.20 V with a CAS latency of 19. The design targets HP Synergy 480 G10 platforms and other servers that accept LRDIMMs to maximise installed memory capacity per channel.

Replaces standard RDIMMs when density limits are

Standard registered DIMMs restrict the number of modules per channel; this LRDIMM removes that ranking limitation so more DIMMs can be populated. The upgrade is worthwhile when virtualization, in-memory databases or HPC workloads demand total system memory beyond what RDIMM populations allow. It also delivers higher memory bandwidth and better energy efficiency than standard RDIMMs at the same 2666 MT/s data rate.

Installation requires matching memory type

The module must be installed in a server platform qualified for DDR4-2666 Load Reduced DIMMs; it cannot be mixed with ECC UDIMMs or standard RDIMMs in the same system. All existing UDIMMs must be removed before populating LRDIMMs. No heat spreader is fitted, so airflow across the module must be adequate. Verify the motherboard or server memory-qualified vendor list before purchase.

How it compares

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

Price $231.99
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 $3.62 per GB
Cheaper than about 84% 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

Will this 288-pin DDR4 LRDIMM fit the HP Synergy 480 G10 memory slots?

The module uses the standard 288-pin DDR4 form factor required by the Synergy 480 G10, so it seats directly in the server’s DIMM sockets.

What is the correct installation sequence for these 4Rx4 Load Reduced modules?

Populate all slots of a channel before moving to the next channel; the common mistake is mixing ranks across channels which prevents the LRDIMM buffer from working.

When should I expect to replace these 64 GB DDR4-2666 CL19 sticks?

They are rated for continuous server operation at 1.20 V; plan replacement only if ECC correctable-error counts rise sharply or a DIMM fails POST.

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