 "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 XMS3 TW3X4G1333C9A 4GB 2X2GB PC3-10666 DDR3-1333 CL9-9-9-24 240PIN Memory Kit" Kit - NCIX"
 Quick Specs: CAS Latency CL9 Compatibility Desktop Memory Number of Modules 2 x 2 GB Number of Pins 240-pin Limited Warranty Lifetime Form Factor DIMM Memory Speed 1333 MHz Memory Size 4 GB Memory Technology DDR3 SDRAM Memory Standard DDR3-1333/PC3-10666 Memory Voltage 1.50 V ProductId 1013305468