Lexar LD4AS004G-R2666GSST 4 GB (1x4GB DDR4-2666)

The Lexar LD4AS004G-R2666GSST 4 GB comes as a single module with 4GB of DDR4 on board. Operating voltage sits at 1.35V. It is rated at 2666 MT/s with a CAS latency of 19, working out to a true latency of about 14.3ns. For gaming, capacity matters more than raw speed past 3600 MT/s — 4GB comfortably covers esports and everyday use.

Use the PlanMyPC system builder to verify it works alongside your other components and to watch live retailer pricing. Support and warranty service run through Lexar, with terms that vary by region. The full specification sheet below breaks out every listed detail, and the compatibility checker flags conflicts with parts already in your build.