Extreme Performance Viper Series DDR3 4GB (2 x 2GB) PC3-12800 Enhanced Latency DIMM Kit
Patriot Memory 4GB DDR3 PC3-12800 Dual Channel DIMM Kit, 4 GB, 2 x 2 GB, DDR3, 1600 MHz
Patriot Memory 4GB DDR3 PC3-12800 Dual Channel DIMM Kit. Internal memory: 4 GB, Memory layout (modules x size): 2 x 2 GB, Internal memory type: DDR3, Memory clock speed: 1600 MHz, CAS latency: 9