 "Corsair XMS3 - DDR3 4 GB: 2 x GB DIMM 240-pin" " Corsair 240-pin TW3X4G1333C9A System Memory (RAM) CDW.com
"The XMS3 family is Corsair's mainstream line of performance DDR3 memory. These modules allow users to experience outstanding memory performance and stability." 
 "Corsair CMV4GX3M2A1333C9"@es
"Memoria RAM DualChannel 2x2GB DDR3-1333 CL9 1.5V, Value Select"@es 