RAM & Memory Upgrades
4GB (2 x 2GB) DDR3 1066/1333/1600MHz 240-PIN DIMM MEMORY RAM KIT COMPATIBLE WITH PC DESKTOPS/MOTHERBOARDS
SIZE/CAPACITY: 4GB KIT (2 x 2GB) VOLTAGE/POWER CONSUMPTION: 1.5v CAS LATENCY: CL7 (DDR3-1066MHz) / CL9 (DDR3-1333/1600MHz) SPEED: PC3-8500 (1066MHz) / PC3-10600 (1333MHz) / PC3-12800 (1600MHz) TYPE/INTERFACE: 240-PIN DDR3 DIMM 240-PIN DDR3 DIMM
https://www.bizrate.co.uk/ram_memoryupgrades/4gb-2-x-2gb-ddr3-oid38916192044.html