Sony VAIO PCV-R Series Memory Upgrade Configurator - choose your Model:

PCV R63
PCV R73
PCV-R522DS
PCV-R526DS
PCV-R528DS
PCV-R532DS
PCV-R536DS
PCV-R538DS
PCV-R539DS
PCV-R545DS
PCV-R547DS
PCV-R549DS
PCV-R553DS
PCV-RX671