A-Tech 4GB DDR4 2133MHz CL15 1.2V 288-Pin Desktop RAM

Direct Kingston KVR21N15S6/4 Replacement

This A-Tech module matches the Kingston KVR21N15S6/4 specification exactly, delivering a 4GB DDR4 2133MHz CL15 DIMM at 1.2V. It installs in any desktop board that accepts a 288-pin unbuffered non-ECC stick.

Upgrade from lower capacity or slower DDR4

Adding this stick replaces a smaller module or a slower DDR4 DIMM, raising total memory and keeping the 2133MHz data rate. The jump is worth it when your system shows high memory usage during everyday multitasking or when the current stick limits the platform to a lower speed.

Suits budget desktop builds and simple repairs

The single 4GB rank works well for office PCs, home servers, or older platforms that only support 2133MHz DDR4. Builders needing higher frequencies, lower latencies, ECC, or larger capacities should look at other modules.