Mushkin MES4S266KF4G 4 GB (1x4GB DDR4-2666)

The Mushkin MES4S266KF4G 4 GB comes as a single module with 4GB of DDR4 on board. It is specced for 2666 MT/s with a CAS latency of 19, working out to a true latency of about 14.3ns. Operating voltage sits at 1.35V. Once memory clears 3600 MT/s, frequency gains taper off, so the 4GB on offer here is the spec that counts for esports and everyday use.

PlanMyPC's builder flags compatibility problems automatically and tracks the latest memory kit deals from multiple stores. Warranty coverage follows Mushkin's standard policy — confirm regional terms on the listing. The full specification sheet below breaks out every listed detail, and the compatibility checker flags conflicts with parts already in your build.