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Green circuit board with black memory chips and gold edge connector

SK hynix

SK hynix HMA851S6AFR6N_UA 4GB DDR4 2400MHz SO-DIMM laptop RAM

SKU CH-WNKS-Q9JCA MPN HMA851S6AFR6N_UA

Adds 4GB of DDR4 laptop memory at 2400MHz with CL17 latency and 1.2V operation

  • 4 GB capacity upgrades multitasking headroom on compatible laptops
  • 2400 MHz DDR4 speed matches PC4-19200 bandwidth for responsive performance
  • Single-rank 1Rx16 organisation keeps electrical load low for stable operation
  • CL17 CAS latency at 1.2 V delivers efficient timing without extra power draw
  • 260-pin SO-DIMM form factor fits standard DDR4 laptop memory slots

Capacity and form factor

This SK hynix module adds 4GB of DDR4 memory in a 260-pin SO-DIMM package built for laptops. It runs at 2400MHz with a CL17 latency and 1.2V operation. The single-rank 1Rx16 layout suits mainstream notebooks that accept PC4-19200 non-ECC SODIMMs.

Rank and voltage impact

The 1Rx16 organisation places all four gigabytes on one rank, which can help compatibility with systems limited to one rank per slot. Standard 1.2V DDR4 voltage means no extra power draw compared with factory modules, so battery life and thermals stay unchanged.

Slot and part-number check

Verify that your laptop has a free 260-pin DDR4 SO-DIMM slot and that the service manual lists PC4-19200 or 2400MHz non-ECC memory as supported. Match the original part number to HMA851S6AFR6N_UA before ordering, because many similar-looking modules are not interchangeable.

Punti di forza

  • 4 GB capacity upgrades multitasking headroom on compatible laptops
  • 2400 MHz DDR4 speed matches PC4-19200 bandwidth for responsive performance
  • Single-rank 1Rx16 organisation keeps electrical load low for stable operation
  • CL17 CAS latency at 1.2 V delivers efficient timing without extra power draw
  • 260-pin SO-DIMM form factor fits standard DDR4 laptop memory slots

Caratteristiche tecniche

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Domande su questo articolo

Will the CL17 latency require any future adjustment or replacement?

CL17 is a fixed timing programmed into the module and does not drift or wear out, so no latency-related maintenance or replacement is needed.

What limit appears first when the 2400MHz module runs continuously at full load?

The JEDEC-defined 1.2V operating voltage and CL17 timing are the electrical limits reached before any thermal throttle on this non-ECC SO-DIMM.

How much heat and power does the 1Rx16 4GB stick produce during all-day operation?

At 1.2V the module draws only a few watts and runs cool enough for passive laptop cooling without audible fan impact.

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