Dell Latitude E6420 (Early 2011) - Manual (Page 122)

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