Patriot Viper 4 GB (2x2GB DDR2-1066)

The Patriot Viper 4 GB comes as 2 modules of 2GB each with 4GB of DDR2 on board. It is specced for 1066 MT/s with a CAS latency of 5, working out to a true latency of about 9.4ns. Operating voltage sits at 1.35V. 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 Patriot's standard policy — confirm regional terms on the listing. The full specification sheet below breaks out every listed detail, and the compatibility checker flags conflicts with parts already in your build.