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Green ADATA DDR4 SO-DIMM circuit board with black memory chips

ADATA

ADATA 8GB DDR4 2666 CL19 SO-DIMM laptop RAM AD4S266638G19-B

SKU CH-8QSK-6N51T MPN AD4S266638G19-B

8 GB DDR4 2666 SO-DIMM with CL19 latency, 1.20 V operation and 260-pin form factor

  • Capacity8GB
  • Type260-Pin DDR4 SO-DIMM
  • SpeedDDR4 2666 (PC4 21300)
  • CAS LatencyCL19
  • Voltage1.20V
  • ECCNo
  • 8 GB capacity for smooth multitasking
  • DDR4-2666 speed for responsive performance
  • CL19 latency for efficient data access
  • 20 V operation reduces power draw
  • 260-pin SO-DIMM fits standard laptop slots

ADATA 8GB DDR4 2666 SO-DIMM

This ADATA module provides 8GB of DDR4 memory in a 260-pin SO-DIMM form factor. It operates at 2666 MHz with a CAS latency of CL19 and a voltage of 1.20V. The unbuffered, non-ECC design targets standard laptop upgrades for everyday computing tasks.

Suitable For Standard Laptop Upgrades

Users needing a single 8GB stick to replace a failed module or fill an empty slot will find this matches the PC4-21300 specification. Systems requiring ECC error correction or registered signal buffering cannot use this unbuffered non-ECC memory.

Key Spec DDR4 2666 CL19 1.20V

The DDR4 2666 speed with CL19 timing at 1.20V is the primary compatibility filter for this part. Verify your laptop supports this exact speed and voltage combination before purchase to ensure the module functions correctly.

Highlights

  • 8 GB capacity for smooth multitasking
  • DDR4-2666 speed for responsive performance
  • CL19 latency for efficient data access
  • 20 V operation reduces power draw
  • 260-pin SO-DIMM fits standard laptop slots

Specifications

BrandADATA
ModelAD4S266638G19-B AD4S266638G19-S
Capacity8GB
Type260-Pin DDR4 SO-DIMM
SpeedDDR4 2666 (PC4 21300)
CAS LatencyCL19
Voltage1.20V
ECCNo
Buffered/RegisteredUnbuffered
Multi-channel KitDual Channel Kit
Recommend UseHigh Performance or Gaming Memory

Questions about this item

Will this 260-pin DDR4 SO-DIMM fit my laptop's memory slot?

The module uses the standard 260-pin DDR4 SO-DIMM form factor and runs at 1.20 V, matching the physical and electrical requirements of any laptop slot built for DDR4 SO-DIMMs.

What is the correct way to seat the module so it locks in place?

Align the notch with the key in the slot, insert at a slight angle, then press down firmly until both side clips click; the step most people miss is not pressing hard enough to engage both clips.

How do I know when this 8 GB CL19 stick should be replaced?

If the system develops random crashes, fails to boot or shows memory errors in a diagnostic tool, the module has likely failed and should be swapped out.

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