We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Green circuit board with black memory chips and gold edge connectors

A-Tech

A-Tech 4GB DDR4 2666MHz CL19 1.2V 260-Pin SODIMM Laptop RAM

SKU CH-M7QX-2C17G

A 4GB DDR4 2666MHz CL19 SODIMM module that upgrades laptop memory for faster multitasking

  • Capacity4GB
  • Type260-Pin DDR4 SO-DIMM
  • SpeedDDR4 2666 (PC4 21300)
  • CAS LatencyCL19
  • Voltage1.20V
  • ECCNo
  • Boosts multitasking with 4 GB DDR4 2666 MHz speed
  • Fits DDR4 laptops using 260-pin SO-DIMM 1.2 V standard
  • Ready for AMD and Intel platforms with CL19 latency
  • Tested for reliability using major-brand memory chips
  • Direct replacement for Lenovo part numbers 01AG811 01AG817 01AG823 01AG829 01AG831 01AG836 01AG863 01AG866 01AG885 4X70R38789 SM30K25316

Capacity and Compatibility

This A-Tech module provides 4GB of DDR4 laptop memory in a 260-pin SO-DIMM form factor. It runs at 2666MHz with CL19 latency and standard 1.2V operation. The unbuffered, non-ECC design suits mainstream AMD and Intel platforms. Major brand chips are used throughout.

Upgrade Path

The module replaces specific IBM-Lenovo part numbers including 01AG823, 01AG885, 01AG811, 01AG866, 01AG836, 01AG863, 01AG829, 01AG817, 01AG831, 4X70R38789, and SM30K25316. The jump is worth it when your system currently runs on less memory or slower DDR4 speeds and you need improved multitasking headroom.

Build Fit

Installation requires an available 260-pin DDR4 SO-DIMM slot in a laptop, notebook, or all-in-one chassis. The 1.2V rating matches standard DDR4 voltage, so no special power considerations apply. Systems limited to a single slot or lower maximum capacity cannot use this module to exceed those limits.

Highlights

  • Boosts multitasking with 4 GB DDR4 2666 MHz speed
  • Fits DDR4 laptops using 260-pin SO-DIMM 1.2 V standard
  • Ready for AMD and Intel platforms with CL19 latency
  • Tested for reliability using major-brand memory chips
  • Direct replacement for Lenovo part numbers 01AG811 01AG817 01AG823 01AG829 01AG831 01AG836 01AG863 01AG866 01AG885 4X70R38789 SM30K25316

Specifications

BrandA-Tech
Capacity4GB
Type260-Pin DDR4 SO-DIMM
SpeedDDR4 2666 (PC4 21300)
CAS LatencyCL19
Voltage1.20V
ECCNo
Buffered/RegisteredUnbuffered
FeaturesMajor Brand Chips
Recommend UseAMD & Intel Compatible

Questions about this item

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

This module uses the standard 260-pin DDR4 SO-DIMM form factor. It fits any laptop or all-in-one slot designed for DDR4 2666 MHz memory.

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

Align the notch on the module with the key in the slot, insert at an angle, then press down firmly until both side clips click. The most common mistake is stopping before the clips engage.

Does this 4 GB stick require any firmware updates or periodic replacement?

No firmware updates are needed for RAM. The module has no moving parts and runs at the standard 1.2 V, so it does not wear out under normal use.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.