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Green circuit board with black memory chips and gold edge connectors

A-Tech

A-Tech 4GB DDR4 2666MHz SODIMM Laptop RAM CL19 1.2V

SKU CH-G6T4-SMJ40

4GB DDR4 2666MHz SODIMM laptop memory with CL19 latency and 1.2V operation

  • Capacity4GB
  • Type260-Pin DDR4 SO-DIMM
  • SpeedDDR4 2666 (PC4 21300)
  • CAS LatencyCL19
  • Voltage1.20V
  • ECCNo
  • Boosts multitasking with 4GB DDR4 2666MHz capacity
  • Low 1.2V power draw extends laptop battery life
  • CL19 latency ensures responsive everyday performance
  • 260-pin SO-DIMM fits standard laptop memory slots
  • Tested replacement for Micron MTA4ATF51264HZ-2G6 modules

4GB DDR4 2666MHz SODIMM Laptop Upgrade

This 4GB DDR4 2666MHz SODIMM module is built for laptop, notebook, and all-in-one owners who need a direct replacement for Micron MTA4ATF51264HZ-2G6 or MTA4ATF51264HZ-2G6J1 parts. It installs in a standard 260-pin slot and runs at the standard 1.2V voltage. The CL19 unbuffered non-ECC design matches the original specification for drop-in compatibility.

Thermals and Power at Standard Voltage

Operating at 1.2V, the module draws minimal power and produces negligible heat without a heat spreader. Passive cooling from the laptop chassis is sufficient for normal workloads. The low voltage keeps fan noise unchanged during everyday multitasking and browsing sessions.

Replaces 4GB Micron DDR4 2666 Modules

This kit replaces a failed or missing Micron MTA4ATF51264HZ-2G6 or MTA4ATF51264HZ-2G6J1 stick with identical capacity, speed, latency, and pin-out. The upgrade is worth it when your system requires a matched 4GB DDR4 2666 module to restore dual-channel performance or to meet the vendor-qualified part list. It is not for buyers who need higher capacity than 4GB or a different DDR generation.

Highlights

  • Boosts multitasking with 4GB DDR4 2666MHz capacity
  • Low 1.2V power draw extends laptop battery life
  • CL19 latency ensures responsive everyday performance
  • 260-pin SO-DIMM fits standard laptop memory slots
  • Tested replacement for Micron MTA4ATF51264HZ-2G6 modules

Specifications

BrandA-Tech
SeriesCompatible Replacement for Micron
ModelMTA4ATF51264HZ-2G6, MTA4ATF51264HZ-2G6J1
Capacity4GB
Type260-Pin DDR4 SO-DIMM
SpeedDDR4 2666 (PC4 21300)
CAS LatencyCL19
Voltage1.20V
ECCNo
Buffered/RegisteredUnbuffered
Heat SpreaderNo
FeaturesMTA4ATF51264HZ-2G6, MTA4ATF51264HZ-2G6J1
Recommend UseCompatible Replacement for Micron MTA4ATF51264HZ-2G6, MTA4ATF51264HZ-2G6J1

Questions about this item

How do I install this 260-pin DDR4 SODIMM and what step is often missed?

Align the notch on the module with the slot key, insert at a 30-degree angle, then press down firmly until both side clips click — the step people miss is not pushing far enough for the clips to engage.

Will this 1.2V CL19 module need any maintenance or replacement later?

No routine maintenance is required; the module has no heat spreader or moving parts, and it only needs replacement if a memory test reports errors or you upgrade capacity.

What limit appears first on this 2666MHz CL19 stick during sustained heavy workloads?

The CL19 latency at 2666MHz is the first bottleneck; bandwidth and voltage remain stable, but tighter-timed or faster-rated memory would reduce wait states under continuous load.

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