Apacer AU 4 GB (1x4GB DDR4-2133)

The Apacer AU 4 GB comes as a single module with 4GB of DDR4 on board. It is specced for 2133 MT/s with a CAS latency of 15, working out to a true latency of about 14.1ns. Operating voltage sits at 1.35V. As a high-end DDR4 kit, it slots naturally into older AM4 and LGA1700 boards that top out at DDR4.

4GB gives you enough headroom for esports and everyday use; past 3600 MT/s, extra frequency brings diminishing returns. Expect to pay around $189.00, which lands it among high-end options. Drop it into the PlanMyPC builder to check compatibility with the rest of your parts and compare current memory kit prices across retailers.