Kingston KVR18R13D4K3/48 48 GB (3x16GB DDR3-1866)

The Kingston KVR18R13D4K3/48 48 GB ships as 3 modules of 16GB each with 48GB of DDR3 on board. It is rated at 1866 MT/s with a CAS latency of 13, working out to a true latency of about 13.9ns. Operating voltage sits at 1.35V. 48GB gives you enough headroom for gaming plus heavy multitasking and content work; 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 Kingston, 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.