Dell latitude E6420 Owner's Manual page 122

Audio
Type
Controller
Stereo conversion
Interface:
Internal
External
Speakers
Internal speaker amplifier
Volume controls
Video
Video type
Data bus:
UMA
Discrete
Controller:
UMA
Latitude E6420
Latitude E6420 ATG
Discrete
Communications
Network adapter
122
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four-channel high definition audio
IDT 92HD90
24-bit (analog-to-digital and digital-to-analog)
high definition audio
microphone-in/stereo headphones/external
speakers connector
two
0.5 W (typical) per channel
keyboard function keys and program menus
• integrated on system board
• discrete
integrated video
• PCI-E x16 Gen1
• PCI-E x16 Gen2
Intel HD Graphics
Intel HD Graphics 3000
NVIDIA NVS 4200M Discrete Graphics (512
MB DDR3)
10/100/1000 Mbps Ethernet LAN