Dell XPS 15 (L501X, Late 2010) - Manual (Page 95)

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Specifications
Video
Integrated
Video
Controller Intel HD Graphics
Video
Memory up to 256 MB
Discrete
Video
Controller NVIDIA GeForce GT 420M
NVIDIA GeForce GT 435M
Video
Memory 1 GB/2 GB DDR3
Display
Type 15.6‑inch HD WLED,
TrueLife
15.6‑inch Full HD
RGBLED, TrueLife
Multi‑touch 15.6‑inch HD
WLED, TrueLife (Optional)
Display
Dimensions:
Height 193.54 mm (7.62 inches)
Width 344.23 mm (13.55 inches)
Diagonal 396.42 mm (15.6 inches)
Maximum
resolution 1920 x 1080
Refresh rate 60 Hz
Operating
angle 0° (closed) to 135°
Horizontal
viewing angle 40/40
Vertical
viewing angle 15/30 (H/L)
Pixel pitch 0.2265 mm x 0.2265 mm