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Green rectangular SO-DIMM circuit board with black memory chips and gold contacts

SK hynix

SK hynix HMA851S6AFR6N-UH 4GB DDR4 2400 CL17 laptop RAM

SKU CH-VES2-3WFCG MPN HMA851S6AFR6N-UH

Adds 4 GB of DDR4 2400 SO-DIMM memory for laptops with CL17 timing at 1.20 V

  • Capacity4GB
  • Type260-Pin DDR4 SO-DIMM
  • SpeedDDR4 2400 (PC4 19200)
  • CAS LatencyCL17
  • Voltage1.20V
  • ECCNo
  • 4 GB capacity upgrades laptop memory for everyday tasks
  • DDR4 2400 speed delivers responsive data transfer rates
  • CL17 latency supports smooth multitasking performance
  • 20 V operation reduces power consumption and heat
  • 260-pin SO-DIMM form factor fits standard laptop slots

4 GB DDR4 laptop module

This single 4 GB DDR4 SO-DIMM runs at 2400 MT/s with CL17 latency and a standard 1.20 V operating voltage. It is an unbuffered, non-ECC module built on a 260-pin form factor for notebook platforms. The stick uses a 1Rx16 organisation and is sold as a new, single-piece upgrade.

Steady throughput on a fixed 1.20 V supply

Under sustained load the module maintains its rated 2400 MT/s speed without requiring a voltage increase, so thermal output stays predictable in thin chassis. CL17 timing remains stable during long sessions because the unbuffered design avoids extra register delay. The fixed 1Rx16 density prevents the rank-interleaving variability seen on higher-capacity sticks.

Press-in SO-DIMM install with one keyed notch

Installation is a straight press into the 260-pin slot until the side clips latch; the single key notch prevents backward insertion. The low-profile height clears most keyboard decks, but very slim ultraportables with soldered memory cannot accept this upgrade. Buyers who need more than 4 GB total capacity or who require ECC error correction should look elsewhere.

Highlights

  • 4 GB capacity upgrades laptop memory for everyday tasks
  • DDR4 2400 speed delivers responsive data transfer rates
  • CL17 latency supports smooth multitasking performance
  • 20 V operation reduces power consumption and heat
  • 260-pin SO-DIMM form factor fits standard laptop slots

Specifications

Brandhynix
SeriesSODIMM Laptop Memory
ModelHMA851S6AFR6N-UH
Capacity4GB
Type260-Pin DDR4 SO-DIMM
SpeedDDR4 2400 (PC4 19200)
CAS LatencyCL17
Voltage1.20V
ECCNo
Buffered/RegisteredUnbuffered

Questions about this item

How much heat and power does the 1.20V DDR4 2400 module generate under continuous load?

The module runs at 1.20 volts, the standard DDR4 voltage, so power draw and heat output stay low during all-day operation.

What must my laptop already have to accept this 260-pin SO-DIMM?

A free DDR4 SO-DIMM slot that supports 2400 MT/s memory and takes 260-pin unbuffered non-ECC modules.

Will this CL17 stick work alongside the CL19 memory already in my system?

Yes, the motherboard will run both modules at the slower CL19 timing automatically.

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