Dell Studio 1557 (Late 2009) - Manual (Page 84)

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Specifications
Computer Model Studio 1555 Studio 1557 Studio 1558
Video
LCD interface Low Voltage Differential
Signaling (LVDS)
LVDS LVDS
TV support HDMI 1.3B HDMI 1.3B HDMI 1.3B
Discrete
Video type integrated on system
board
integrated on system
board
integrated on system
board
Video controller ATI Mobility Radeon HD
4570
ATI Mobility Radeon
HD 4570
ATI Mobility Radeon
HD 4570
ATI Mobility Radeon
HD 5470
Video memory GDDR3 256 MB/512 MB DDR3 512 MB/1 GB DDR3 512 MB/1 GB