 "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 CMZ4GX3M1A1600C9 4GB 1X4GB DDR3-1600 CL9-9-9-24 Memory" Memory - CMZ4GX3M1A1600C9B NCIX"
 Quick Specs: CAS Latency CL9 Compatibility Desktop Number of Modules 1 x 4 GB Number of Pins 240-pin Limited Warranty Lifetime Form Factor DIMM Memory Speed 1600 MHz Memory Size 4 GB Memory Technology DDR3 SDRAM Memory Standard DDR3-1600/PC3-12800 Memory Voltage 1.50 V ProductId 1019511862