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Green rectangular circuit board with black memory chips and gold edge contacts

SK hynix

SK hynix HMA81GSJJR8N-VK 8GB DDR4-2666 laptop RAM

SKU CH-1X27-HDGDN MPN HMA81GSJJR8N-VK

Adds 8 GB of DDR4 memory at 2666 MHz with CL19 latency and 1.20 V operation

  • Capacity8GB
  • Type260-Pin DDR4 SO-DIMM
  • SpeedDDR4 2666 (PC4 21300)
  • CAS LatencyCL19
  • Voltage1.20V
  • ECCNo
  • 8 GB capacity expands multitasking headroom for everyday workloads
  • DDR4-2666 speed delivers responsive data throughput for mainstream laptops
  • CL19 latency supports smooth operation in standard SO-DIMM slots
  • 20 V operation reduces power draw compared with older DDR generations
  • 260-pin unbuffered design fits compatible notebook memory sockets

8GB DDR4 SO-DIMM for laptop upgrades

This SK hynix module delivers 8GB of DDR4 memory in a 260-pin SO-DIMM form factor. It operates at 1.20V with a CL19 latency rating. The stick is unbuffered and non-ECC, designed for standard laptop memory slots.

Best for single-slot capacity boosts

Suits owners replacing a failed stick or adding capacity to an empty slot in a compatible DDR4 laptop. Not for systems that require registered or ECC memory, nor for desktops needing full-size DIMMs. Buyers needing more than 8GB total should look at multi-module kits or higher-density sticks.

PC4-21300 (DDR4-2666) bus speed confirms fit

The module runs at the PC4-21300 data rate, which is the DDR4-2666 standard. Verify that your laptop's memory controller supports this exact speed before purchase, as slower or faster platforms may not boot with this rating.

Highlights

  • 8 GB capacity expands multitasking headroom for everyday workloads
  • DDR4-2666 speed delivers responsive data throughput for mainstream laptops
  • CL19 latency supports smooth operation in standard SO-DIMM slots
  • 20 V operation reduces power draw compared with older DDR generations
  • 260-pin unbuffered design fits compatible notebook memory sockets

Specifications

BrandHynix
SeriesSODIMM Laptop Memory
ModelHMA81GSJJR8N-VK
Capacity8GB
Type260-Pin DDR4 SO-DIMM
SpeedDDR4 2666 (PC4 21300)
CAS LatencyCL19
Voltage1.20V
ECCNo
Buffered/RegisteredUnbuffered

Questions about this item

Will the CL19 timing on this 8GB DDR4-2666 SODIMM need any adjustment later?

The module runs at CL19 by default and does not require timing changes during its service life.

What limit appears first when this 260-pin module runs continuously at DDR4-2666?

Sustained operation is bounded by the 1.20V voltage ceiling and CL19 latency rather than thermal throttling.

How much heat or fan noise does this unbuffered 8GB stick add in all-day use?

At 1.20V the module produces minimal heat and adds no audible noise to the laptop cooling system.

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