Dell Inspiron 15R (5537, Mid 2013) - Manual (Page 9)

Specifications
Views
System
Information
Memory
Ports and
Connectors
Dimensions and
Weight
Computer
Environment
Storage
Touchpad Power Adapter Camera
Communications
Battery
Video Audio
Display
Media-card
reader
Keyboard
Memory
Connectors:
Inspiron 5521 Two internally-accessible DDR3 SODIMM connectors
Inspiron 5537 Two internally-accessible DDR3L SODIMM connectors
Capacity Up to 16 GB
Type:
Inspiron 5521 Dual channel DDR3
Inspiron 5537 Dual channel DDR3L
Speed Up to 1600 MHz
Configurations supported 2 GB, 4 GB, 6 GB, 8 GB, and 16 GB