Toshiba Satellite L640 Series Memory Upgrade Configurator - choose your Model:

L640-00U
L640-02V
L640-0CS
L640-1007U
L640-1011U
L640-1030X
L640-1033X
L640-1035X
L640-1037X
L640-1040U
L640-1049U
L640-1068U
L640-1086X
L640-1093X
L640-BT2N22