G.Skill FA-10666CL9S-4GBSQ 4 GB (1x4GB DDR3-1333)

The G.Skill FA-10666CL9S-4GBSQ 4 GB ships as a single module with 4GB of DDR3 on board. Operating voltage sits at 1.35V. It is rated at 1333 MT/s with a CAS latency of 9, working out to a true latency of about 13.5ns. 4GB gives you enough headroom for esports and everyday use; past 3600 MT/s, extra frequency brings diminishing returns.

Use the PlanMyPC system builder to verify it works alongside your other components and to watch live retailer pricing. Warranty coverage follows G.Skill's standard policy — confirm regional terms on the listing. Scroll down for the complete spec table; the builder's compatibility checker will warn you about any conflicts with components you have already picked.