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Green circuit board with black memory chips and gold edge connector

SK hynix

SK hynix HMA851S6CJR6N-VK_UB DDR4 4GB SO-DIMM 2666MHz CL19 1.2V accessory

SKU CH-VTAH-KGMVF MPN HMA851S6CJR6N-VK_UB

4GB DDR4 laptop SO-DIMM running at 2666MHz with CL19 latency and 1.2V operation

  • 4GB capacity for smooth multitasking
  • DDR4 SO-DIMM fits standard laptop slots
  • 2666MHz speed with CL19 latency
  • Low 1.2V voltage reduces power draw
  • 260-pin non-ECC module for broad compatibility

4GB DDR4 SO-DIMM laptop memory

This SK hynix module adds 4GB of DDR4 SDRAM to a compatible notebook. It uses the standard 260-pin SO-DIMM form factor and runs at 2666MHz with CL19 latency. The stick is rated for 1.2V operation and carries the PC4-21300 bus designation. It is a non-ECC, single-rank 1Rx16 device intended for laptop memory upgrades.

Suits owners matching the exact part number

Buyers who have verified their original part number against the compatible list (01AG823, SM30K25310, KN.4GB0G.049, 862398-855, L10598-855, PC4-2666V-SC0-11, 11S01AG823, 8SSM30K25310, KN4GB0G049) can install this module with confidence. Those who need ECC support, a different voltage, another capacity, or a different pin count should look at other modules. The unit is used, graded very good with minor cosmetic marks, and ships without accessories.

260-pin DDR4 SO-DIMM form factor

The decisive specification is the 260-pin DDR4 SO-DIMM interface combined with 2666MHz speed and CL19 timing. Your laptop must accept this exact pin layout, voltage and timing for the module to function. Cross-reference the part numbers above before ordering.

Highlights

  • 4GB capacity for smooth multitasking
  • DDR4 SO-DIMM fits standard laptop slots
  • 2666MHz speed with CL19 latency
  • Low 1.2V voltage reduces power draw
  • 260-pin non-ECC module for broad compatibility

Specifications

No published specifications for this item yet.

Questions about this item

How can I verify the module is running at 2666 MHz after installation?

Open Task Manager or BIOS and confirm the memory speed reads 2666 MHz with CL19 timings at 1.2 V.

What comes in the package and what must I source separately?

Only the 4 GB DDR4 SO-DIMM is included; no cables, manuals or tools are supplied.

Which capacity and rank should I choose for a single-slot upgrade?

This is a 4 GB 1Rx16 module; select it if your laptop has one free 260-pin slot and supports PC4-21300.

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