Crucial CT2KIT25664AC667 4 GB (2x2GB DDR2-667)

The Crucial CT2KIT25664AC667 4 GB arrives as 2 modules of 2GB each with 4GB of DDR2 on board. Operating voltage sits at 1.35V. It is specced for 667 MT/s with a CAS latency of 5, working out to a true latency of about 15ns.

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. 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 Crucial, with terms that vary by region.