Corsair XMS2 4 GB (2x2GB DDR2-800)

The Corsair XMS2 4 GB comes as 2 modules of 2GB each with 4GB of DDR2 on board. Operating voltage sits at 1.35V. It is rated at 800 MT/s with a CAS latency of 5, working out to a true latency of about 12.5ns. 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. Support and warranty service run through Corsair, with terms that vary by region. Scroll down for the complete spec table; the builder's compatibility checker will warn you about any conflicts with components you have already picked.