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Two green SO-DIMM sticks with gold contacts, 8GB kit

SK hynix

SK hynix HMA851S6DJR6N-VK 8GB (2×4GB) DDR4 2666 laptop RAM

SKU CH-9V7D-0MPV8 MPN HMA851S6DJR6N-VK

Adds 8 GB of DDR4 2666 memory in two 4 GB SO-DIMM modules at 1.20 V CL19

  • Capacity8GB (2 x 4GB)
  • Type260-Pin DDR4 SO-DIMM
  • SpeedDDR4 2666 (PC4 21300)
  • CAS LatencyCL19
  • Voltage1.20V
  • ECCNo
  • 8 GB total capacity in a matched pair of 4 GB modules
  • DDR4 2666 speed rated at PC4-21300 for responsive multitasking
  • Low 1.20 V operation reduces power draw and heat
  • CL19 latency timing supports smooth everyday performance
  • 260-pin SO-DIMM form factor fits standard laptop memory slots

8 GB DDR4 2666 SO-DIMM kit

This SK hynix kit provides 8 GB of DDR4 laptop memory across two 4 GB modules. The SO-DIMMs run at 2666 MHz with a CAS latency of CL19 and operate at the standard 1.20 V. They are unbuffered and non-ECC, matching the common specification for mainstream notebooks.

Suits standard DDR4 laptop upgrades

Builders upgrading a notebook that accepts 260-pin DDR4 SO-DIMMs at 2666 MHz can use this pair. Systems that require ECC registered modules or a different pin count cannot use this kit. Buyers needing a single 8 GB stick or a higher total capacity should look at other configurations.

260-pin DDR4 SO-DIMM form factor

The decisive specification is the 260-pin DDR4 SO-DIMM interface combined with the DDR4 2666 (PC4-21300) speed rating. Only platforms that support this exact pin layout and data rate will accept the modules.

Highlights

  • 8 GB total capacity in a matched pair of 4 GB modules
  • DDR4 2666 speed rated at PC4-21300 for responsive multitasking
  • Low 1.20 V operation reduces power draw and heat
  • CL19 latency timing supports smooth everyday performance
  • 260-pin SO-DIMM form factor fits standard laptop memory slots

Specifications

BrandHynix
SeriesSODIMM Laptop Memory
ModelHMA851S6DJR6N-VK
Capacity8GB (2 x 4GB)
Type260-Pin DDR4 SO-DIMM
SpeedDDR4 2666 (PC4 21300)
CAS LatencyCL19
Voltage1.20V
ECCNo
Buffered/RegisteredUnbuffered

Questions about this item

Does the DDR4 2666 interface cap at PC4-21300 bandwidth in practice?

Yes, the kit runs at DDR4-2666 which corresponds to a PC4-21300 data rate.

Will the 260-pin SO-DIMM modules fit my laptop's memory slots?

Each module uses the standard 260-pin DDR4 SO-DIMM form factor used by most modern notebooks.

How do I install the two 4 GB sticks, and what step do people often miss?

Power off, unplug, open the panel, insert each stick at an angle until the side clips click — many forget to press down firmly until both clips lock.

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