Dell XPS 15 (L502X, Early 2011) - Manual (Page 99)

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Specifications
Audio
Audio
controller Realtek ALC665
Speakers 2 x 4 Watt main speakers
+ 12 Watt subwoofer
Peak output 20 W
Volume
controls software program menus
and media controls
Video
Integrated
Video
controller Intel HD Graphics
Video
memory up to 1.6 GB
Discrete
Video
controller NVIDIA GeForce GT 525M
NVIDIA GeForce GT 540M
Video
memory 1 GB DDR3 (GT 525M)
2 GB DDR3 (GT 540M)