Dell XPS 13 (L322X, Early 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
Cards
Supported
Keyboard
Memory
Capacity 4 GB or 8 GB
Memory type up to 1600 MHz, Dual‑channel DDR3L configuration