Dell XPS 13 (9343, Early 2015) - Manual (Page 9)

Specifications
Views
System
information
Memory
Ports and
connectors
Dimensions and
weight
Computer
environment
Storage
Touch pad Power adapter Camera
Communications
Battery
Video Audio
Display
Media‑card
reader
Keyboard
Memory
Type DDR3L‑RS
Speed 1600 MHz
Configurations supported 4 GB and 8 GB
NOTE: The memory is integrated on the system board.