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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

  • Total capacity8 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • CAS latencyCL19
  • Rated voltage1.2 V
  • Buffer typeUnbuffered
  • Product type260-Pin DDR4 SO-DIMM
  • 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.

How it compares

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

Price $48.99
Cheaper than about 59% of the 2,079 comparable items (median $70.99).
Total capacity 8 GB
Lower than about 60% of the 1,886 comparable items (median 16 GB).
Price per GB $6.12 per GB
Typical for this category: the median of 1,886 items is $5.94 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 nameHynix
Product lineSODIMM Laptop Memory
Model nameHMA81GSJJR8N-VK
Total capacity8 GB
Product type260-Pin DDR4 SO-DIMM
Performance
Rated speedDDR4 2666 (PC4 21300)
Memory
CAS latencyCL19
ECC supportNo
Buffer typeUnbuffered
Power
Rated voltage1.2 V

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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