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Green rectangular SO-DIMM module with black memory chips and gold edge contacts

SK hynix

SK hynix HMA851S6CJR6N-XN 4GB DDR4 3200MHz laptop RAM

SKU CH-0AD8-Q54T7 MPN HMA851S6CJR6N-XN

A 4 GB DDR4 SO-DIMM running at 3200 MHz with CL22 latency for laptop upgrades

  • Total capacity4 GB
  • Rated speedDDR4 3200 (PC4 25600)
  • CAS latencyCL22
  • Rated voltage1.2 V
  • Buffer typeUnbuffered
  • Product type260-Pin DDR4 SO-DIMM
  • 4 GB capacity upgrades laptop multitasking
  • DDR4 3200 MHz speed accelerates data transfer
  • 2 V operation reduces power draw
  • CL22 latency delivers responsive performance
  • 260-pin SO-DIMM fits standard laptop slots

4 GB DDR4 laptop module

This SK hynix SO-DIMM delivers 4 GB of DDR4 memory at 3200 MHz for laptops, notebooks and all-in-one PCs. The 260-pin unbuffered module runs at 1.20 V with a CAS latency of 22. It suits users upgrading a single slot or adding capacity to a compatible system.

Sustained operation at 3200 MHz

The module maintains its rated 3200 MHz speed under continuous workloads thanks to standard DDR4 signalling and 1.20 V operation. Single-rank 1Rx16 organisation keeps electrical loading low, helping stability during extended sessions. No ECC circuitry means all bandwidth serves application data.

CL22 latency at 1.20 V

The decisive specification is CAS latency 22 at the standard 1.20 V DDR4 voltage. Systems requiring lower latency or higher voltage modules will not match this timing profile. Buyers needing ECC error correction or registered buffering must choose a different part.

How it compares

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

Price $35.99
Cheaper than about 68% 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 $9.00 per GB
Pricier than about 75% of the 1,886 comparable items (median $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 nameHMA851S6CJR6N-XN
Total capacity4 GB
Product type260-Pin DDR4 SO-DIMM
Performance
Rated speedDDR4 3200 (PC4 25600)
Memory
CAS latencyCL22
ECC supportNo
Buffer typeUnbuffered
Power
Rated voltage1.2 V

Questions about this item

How much heat and power will this 1.20 V DDR4 3200 MHz module draw during continuous all-day use?

The module runs at the standard DDR4 voltage of 1.20 V, keeping power draw and heat output low for typical laptop workloads.

What slot type and form factor must my laptop already have for this 260-pin SO-DIMM to fit?

Your laptop needs a 260-pin DDR4 SO-DIMM slot; the stick measures 133 mm long, 30 mm high and 3 mm wide.

Will this CL22 single-rank stick run at its rated speed when paired with slower DDR4 modules already in the system?

The memory controller will down-clock all modules to the speed of the slowest stick, so this 3200 MHz module will run at the lower frequency.

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