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

SK hynix

SK hynix HMA81GS6DJR8N-VK 8GB DDR4 2666 laptop RAM

SKU CH-AY1A-J59JM MPN HMA81GS6DJR8N-VK

Adds 8 GB of DDR4 2666 memory to a laptop via a 260-pin SO-DIMM running at CL19 and 1.20 V

  • 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 smooth operation
  • CL19 latency keeps memory access snappy during routine tasks
  • 20 V operation reduces power draw and heat in laptops
  • 260-pin SO-DIMM form factor fits standard DDR4 laptop slots

8 GB DDR4 2666 SO-DIMM

This module is a single 8 GB DDR4 SO-DIMM rated at 2666 MT/s with CL19 latency and 1.20 V operation. It uses the standard 260-pin layout for laptop memory slots and is unbuffered, non-ECC memory. The PC4-21300 designation matches the 2666 speed grade.

Suits laptops with a free DDR4 SO-DIMM slot

It suits owners upgrading a laptop that accepts DDR4 SO-DIMMs at 2666 MT/s and needs an 8 GB module. It is not for systems that require ECC, registered memory, a different voltage or a higher speed grade. Buyers needing more than 8 GB per slot or a lower latency should look at other modules.

2666 MT/s DDR4 speed grade

The decisive specification is the 2666 MT/s DDR4 rating (PC4-21300). The laptop memory controller must support this speed; otherwise the module will not run at its rated frequency. Verify the slot type and maximum supported speed before purchase.

How it compares

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

Price $45.99
Cheaper than about 61% 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 $5.75 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 nameSK hynix
Product lineSODIMM Laptop Memory
Model nameHMA81GS6DJR8N-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

Does this module use the standard 260-pin SO-DIMM layout for laptop DDR4 slots?

Yes, it is a 260-pin DDR4 SO-DIMM, the standard form factor for laptop memory slots.

What is the correct way to seat the module so the side clips engage?

Insert the module at an angle, then press down evenly until the retention clips on both sides snap into the notches on the PCB.

Will this RAM require any firmware updates or battery replacements over its service life?

No, it is unbuffered non-ECC DRAM with no onboard firmware or battery; it operates passively once installed.

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