A-Tech 4GB DDR4 2133MHz CL15 1.2V 260-Pin SODIMM Samsung M471A5244CB0-CPB 1Rx16 Laptop RAM

4GB DDR4 2133MHz Laptop SODIMM

This 4GB DDR4 2133MHz module fits 260-pin SODIMM slots in laptops, notebooks and all-in-one systems. It runs at CL15 latency with a standard 1.2V supply and uses a 1Rx16 Samsung-based layout. The stick is non-ECC and unbuffered, matching mainstream consumer platforms. Buyers who need more than 4GB of capacity or who require ECC error correction for workstation tasks should look elsewhere.

DDR4 2133MHz PC4-17000 speed limit

The DDR4 2133MHz interface caps peak bandwidth at the PC4-17000 rate, so systems that support faster DDR4 will clock this module down to 2133MHz. Mixing it with higher-speed sticks forces the whole memory subsystem to run at the lowest common speed. The CL15 timing is fixed for this speed grade and cannot be tightened without exceeding the rated specification.

Simple SODIMM insertion, verify slot count first

Installation requires opening the laptop's memory compartment, aligning the 260-pin key and pressing the module until the side clips latch. The most common issue is a slot-count mismatch — some ultra-thin models have only one socket soldered to the board, leaving no room for an upgrade. Always confirm the number of available SODIMM slots and the maximum supported capacity in the system manual before purchase.