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Green circuit board with black memory chips and gold edge connectors

SK hynix

SK hynix HMABAGR7A4R4N-VN 128GB DDR4-2666 ECC Registered Octal Rank server RAM

SKU CH-QCAK-QGP6T

A 128 GB DDR4-2666 registered ECC module with octal-rank organisation for high-density server memory configurations

  • Capacity128GB
  • Type288-Pin DDR4 SDRAM
  • SpeedDDR4 2666 (PC4 21300)
  • CAS LatencyCL19
  • ECCYes
  • Buffered/RegisteredRegistered
  • 128 GB capacity supports large server workloads
  • DDR4-2666 speed delivers 21300 MT/s data rate
  • ECC registered design protects data integrity
  • Octal rank architecture maximises module density
  • 288-pin DDR4 form factor fits standard server slots

128GB DDR4-2666 ECC Registered Server Memory

This 128GB module uses 288-pin DDR4 SDRAM rated at 2666 MT/s with PC4-21300 bandwidth. It targets servers and workstations that require error-correcting code and registered signal buffering for high-density configurations.

Installation notes and common issues

The module plugs into standard 288-pin DDR4 RDIMM slots and is keyed to prevent misalignment. Builders must verify that the platform supports octal-rank registered DIMMs and the CL19 latency profile, otherwise the system may fail to post or cap usable capacity.

Octal rank density constraint

Octal rank organisation allows 128GB in a single stick but increases electrical load on the memory controller. Platforms limited to dual-rank or quad-rank modules cannot use this part, so the rank count is the decisive compatibility filter.

Puntos fuertes

  • 128 GB capacity supports large server workloads
  • DDR4-2666 speed delivers 21300 MT/s data rate
  • ECC registered design protects data integrity
  • Octal rank architecture maximises module density
  • 288-pin DDR4 form factor fits standard server slots

Especificaciones

BrandHynix
Part NumberHMABAGR7A4R4N-VN
Capacity128GB
Type288-Pin DDR4 SDRAM
SpeedDDR4 2666 (PC4 21300)
CAS LatencyCL19
ECCYes
Buffered/RegisteredRegistered

Preguntas sobre este artículo

How can I confirm the 128GB DDR4-2666 module is running at the correct CL19 latency after installation?

Enter the system BIOS or UEFI and verify the memory frequency reads 2666 MT/s with CAS latency set to 19; the registered ECC design also allows the OS to report corrected error counts, confirming active ECC operation.

What comes with the HMABAGR7A4R4N-VN module and what must I source separately?

The box contains the single 128GB 288-pin DDR4 registered DIMM; you must provide a compatible server or workstation motherboard with DDR4 RDIMM slots and a CPU that supports octal-rank registered memory.

Which capacity and rank version should I choose for a server needing maximum density per slot?

This part is a single 128GB octal-rank DDR4-2666 registered module; choose it when your platform supports octal-rank RDIMMs and you need the highest capacity per 288-pin slot.

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