 "Crucial 4GB (1x4GB) DDR3L / DDR3 PC3-12800 1600MHz SO-DIMM Module "@en 1x4GB | CT51264BF160B Novatech"@en
"DDR3 / DDR3L, 1600MHz, CL11, 1.35v / 1.50v, Lifetime Warranty"@en 
 Memory Type DDR3 (PC3-12800) Capacity 4GB (1 x 4GB) Tested Speed 1600MHz Tested Latency 11-11-11-28 Tested Voltage 1.35v or 1.50v (Dual Voltage) Registered / Unbuffered Unbuffered Error Checking Non-ECC Memory Features N/A
 "Corsair 4096Mb DDR3 1333MHz SODIMM Memory" Memory | CMSO4GX3M1A1333C9"
"Corsair 4096Mb DDR3 1333MHz SODIMM Memory" 
 Item Code : MEC-S34096X13 Item : Corsair 4096Mb DDR3 1333MHz SODIMM Memory Brand : Corsair Model : CMSO4GX3M1A1333C9 EAN : 5052179042034 Size : 4Gb Bus Speed : PC3-10666 (1333) CAS Latency : 9-9-9-24 Number of Pins : 204 Other : Non-ECC, Unbuffered Weight (kg) : 2.00 Price : £32.70