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Green circuit board with black memory chips and gold edge connectors

SK hynix

SK hynix HMA81GR7AFR8N-VK 8GB DDR4-2666 ECC Registered CL19 288-Pin desktop RAM

SKU CH-8B80-V1S6K

An 8 GB DDR4-2666 ECC registered DIMM with CL19 latency for server and workstation memory upgrades

  • Capacity8GB
  • Type288-Pin PC RAM
  • SpeedDDR4 2666 (PC4 21300)
  • ECCYes
  • Buffered/RegisteredRegistered
  • ECC protection guards data integrity in servers
  • Registered buffering reduces electrical load for stable multi-DIMM operation
  • DDR4-2666 speed delivers 21300 MT/s bandwidth for responsive workloads
  • Single-rank 8 GB module fits dense memory configurations
  • Low 1.2 V operation cuts power draw in always-on systems

Capacity and purpose

This is an 8GB DDR4 registered ECC module built for servers and workstations that require error correction and signal buffering. The single-rank design fits a standard 288-pin DIMM slot and operates at 1.2V. Buyers who need unbuffered memory for a consumer desktop board should look elsewhere.

Speed and standard limits

The module is rated for DDR4-2666 with a PC4-21300 bandwidth ceiling and a CAS latency of 19. Manufacturer data also lists a DDR4-2933 PC4-23400 variant at CL21, showing the upper bound of the same part family. Systems that cannot run registered DIMMs or that top out below 2666 MT/s will not use this memory at its rated speed.

Registered ECC requirement

The decisive specification is the registered ECC architecture; only motherboards with a registered-DIMM memory controller and ECC support can accept this module. Consumer chipsets that lack those features will not post with it installed.

Puntos fuertes

  • ECC protection guards data integrity in servers
  • Registered buffering reduces electrical load for stable multi-DIMM operation
  • DDR4-2666 speed delivers 21300 MT/s bandwidth for responsive workloads
  • Single-rank 8 GB module fits dense memory configurations
  • Low 1.2 V operation cuts power draw in always-on systems

Especificaciones

BrandHynix
Part NumberHMA81GR7AFR8N-VK
Capacity8GB
Type288-Pin PC RAM
SpeedDDR4 2666 (PC4 21300)
ECCYes
Buffered/RegisteredRegistered

Preguntas sobre este artículo

Will this registered ECC module work in a standard desktop motherboard?

Registered ECC DIMMs require a motherboard and CPU that explicitly support registered memory; most consumer desktop boards do not, so check your platform documentation before ordering.

What do the two CAS latency values mean for real-world use?

The module is rated CL19 at 2666 MT/s and CL21 at 2933 MT/s; the system will automatically select the supported speed and corresponding latency.

Is any additional hardware or configuration needed to run at the rated speeds?

Enable the appropriate XMP or DOCP profile in the BIOS to reach 2666 MT/s CL19 or 2933 MT/s CL21; otherwise the module will run at the default JEDEC speed.

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