 "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 Vengeance Blue 4Gb DDR3 1600 (1x4Gb) CL9 Module" Module | CMZ4GX3M1A1600C9B"
"Corsair Vengeance Blue 4Gb DDR3 1600 (1x4Gb) CL9 Module" 
 Item Code : MEC-D3-4096EB6 Item : Corsair Vengeance Blue 4Gb DDR3 1600 (1x4Gb) CL9 Module Brand : Corsair Model : CMZ4GX3M1A1600C9B EAN : 8435910123556 Size : 4Gb Bus Speed : 1600MHz PC3-12800 CAS Latency : 9-9-9-24 Number of Pins : 240-pin Other : Cerulean Blue heatsink Weight (kg) : 0.20 Price : £28.27