Dell Alienware Area-51 ALX (Late 2009) - Manual (Page 5)

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COMPREHENSIVE SPECIFICATIONS
Top Panel Connectors
IEEE 1394
one 6-pin serial connector
USB three 4-pin USB 2.0-compliant connectors
eSATA one 4-pin eSATA connector
Audio stereo headphone and microphone connectors
Communications
Network adapter
10/100/1000 Mbps Ethernet LAN on system board
Wireless Bluetooth ® wireless technology
WiFi (optional)
Video
Type
three PCI Express x16 connectors for full-length
add-in graphics card(s)
Audio
Type
integrated 7.1 channel, High Definition Audio with
S/PDIF support, Realtek ALC888 codec
Expansion Bus
PCI
Connectors one
Connector size 124-pin connector
PCI Express x1
Connectors two
Connector size 36-pin connector
PCI Express x16
Connectors three
Connector size 164-pin connector
PCI Express x16 lane information
Number of lanes
Connectors used PCI_E1 PCI_E3 PCI_E5
PCI_E1 and PCI_E3 16 16 4
PCI_E1, PCI_E3, and PCI_E5 16 8 8
NOTE: For the location of the PCI Express x16 connectors, see the
Service Manual at support.dell.com/manuals.