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Green rectangular circuit board with black memory chips and gold edge connectors

A-Tech

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

SKU CH-FB3W-2J813

A 4 GB DDR4 SODIMM running at 2666 MHz with CL19 latency and 1.2 V operation for laptop upgrades

  • Total capacity4 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • CAS latencyCL19
  • Rated voltage1.2 V
  • Buffer typeUnbuffered
  • Recommended forCompatible Replacement for Micron MTA8ATF51264 Hz-2G6B1
  • 4GB DDR4 capacity expands multitasking headroom for everyday workloads
  • 2666MHz speed with CL19 timing delivers responsive data access
  • 2V operation matches DDR4 standard for efficient power use
  • 260-pin SO-DIMM form factor fits compatible laptop memory slots
  • Tested replacement for Micron MTA8ATF51264HZ-2G6B1 ensures reliable compatibility

4GB DDR4 2666 SODIMM laptop upgrade

This A-Tech module delivers 4GB of DDR4 memory at 2666MHz with CL19 latency and 1.20V operation. The 260-pin SO-DIMM form factor fits standard laptop, notebook and all-in-one sockets. It is an unbuffered, non-ECC replacement matched to the Micron MTA8ATF51264HZ-2G6B1 part number.

For single-slot capacity boosts.

Buyers adding a single 4GB stick to an empty slot or replacing a failed module will find this a direct fit. Systems that require ECC registered memory or need higher densities per slot should look elsewhere, as this module is non-ECC unbuffered and limited to 4GB.

CL19 latency at DDR4 2666 speed

The CAS latency of 19 cycles at 2666MHz determines how quickly the memory responds to read requests. Matching this timing to your platform's supported speed is the key factor in deciding if this module will run at its rated performance.

How it compares

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

Price $29.99
Cheaper than about 74% 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 $7.50 per GB
Pricier than about 65% of the 1,886 comparable items (median $5.94 per GB).

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Specifications

Product
Brand nameA-Tech
Product lineCompatible Replacement for Micron
Model nameMTA8ATF51264 Hz-2G6B1
Total capacity4 GB
Product type260-Pin DDR4 SO-DIMM
Performance
Rated speedDDR4 2666 (PC4 21300)
Memory
CAS latencyCL19
ECC supportNo
Buffer typeUnbuffered
Heat spreaderNo
Power
Rated voltage1.2 V
Compatibility
Recommended forCompatible Replacement for Micron MTA8ATF51264 Hz-2G6B1

Questions about this item

What does the DDR4 2666 (PC4-21300) interface mean for real-world speed?

The module runs at 2666 MT/s with CL19 timing, so the DDR4 2666 interface sets the maximum data rate the memory controller can use.

Will the 260-pin SO-DIMM fit my laptop slot?

This is a 260-pin DDR4 SO-DIMM; it fits standard laptop DDR4 slots that accept 260-pin modules.

How do I install it and what step do people miss?

Power off, unplug, open the panel, align the notch on the 260-pin edge connector, press firmly until the side clips click — the step often missed is pressing hard enough to seat both clips.

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