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Green 260-pin DDR4 SO-DIMM laptop memory module

SK hynix

SK hynix HMA851S6DJR6N-VK 4 GB DDR4 2666 CL19 laptop RAM

SKU CH-M076-F44QZ MPN HMA851S6DJR6N-VK

Adds 4 GB of DDR4 2666 CL19 laptop memory in a single 260-pin SO-DIMM module running at 1.20 V

  • Total capacity4 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • CAS latencyCL19
  • Rated voltage1.2 V
  • Buffer typeUnbuffered
  • Product type260-Pin DDR4 SO-DIMM
  • 4 GB capacity adds responsive multitasking headroom
  • DDR4 2666 speed delivers snappy data throughput
  • CL19 latency keeps everyday tasks running smoothly
  • 20 V operation reduces power draw and heat
  • 260-pin SO-DIMM fits standard laptop memory slots

4 GB DDR4 2666 SO-DIMM

This SK hynix module provides 4 GB of DDR4 memory in a 260-pin SO-DIMM form factor. It runs at 2666 MT/s with a CAS latency of CL19 and operates at the standard 1.20 V. The unbuffered, non-ECC design is intended for laptop memory slots.

Suits owners of DDR4 laptops needing a single 4 GB

This module fits notebooks that accept 260-pin DDR4 SO-DIMMs at 2666 MT/s. Systems requiring ECC, registered memory, higher capacities per slot, or a different pin count cannot use this part.

260-pin DDR4 SO-DIMM interface

The 260-pin SO-DIMM connector is the sole physical and electrical interface that determines compatibility. Verify the laptop manual specifies DDR4 SO-DIMM slots before purchase.

How it compares

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

Price $30.99
Cheaper than about 73% of the 2,079 comparable items (median $70.99).
Total capacity 4 GB
Lower than about 80% of the 1,886 comparable items (median 16 GB).
Price per GB $7.75 per GB
Pricier than about 68% of the 1,886 comparable items (median $5.94 per GB).

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Specifications

Product
Brand nameSk hynix
Product lineSODIMM Laptop Memory
Model nameHMA851S6DJR6N-VK
Total capacity4 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 latency ever require adjustment or replacement?

The CL19 timing is fixed in the module's SPD and does not change; no maintenance or replacement is needed for latency.

What limit appears first during sustained heavy workloads?

The 4 GB capacity fills before speed or latency become bottlenecks in typical sustained use.

How much heat and power does the 1.20 V module produce running all day?

At 1.20 V the SO-DIMM draws minimal power and generates low heat; it has no fan and runs silently.

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