Dell XPS 410 (Mid 2007) - Manual (Page 124)

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Appendix
Audio
Type Sigmatel 9227 audio codec
Internal 7.1 channel or PCI option cards
Expansion Bus
Bus type PCI 32-bit (PCI Specification 2.2)
PCI Express x1, x4, and x16 (PCI express 1.1a)
Bus speed PCI: 33 MHz
PCI Express:100 MHz
Bus throughput PCI Express:
x1 slot bidirectional speed - 500 MB/s
x4 slot bidirectional speed - 2 GB/s
x16 slot bidirectional speed - 8 GB/s
PCI
connectors three
connector size 120 pins
connector data width (maximum) 32 bits
PCI Express
connector one x1
connector size 36 pins
connector data width (maximum) 1 PCI Express lane
PCI Express
connector one x4 (x8 connector wired as x4 electrically)
connector size 98 pins
connector data width (maximum) 4 PCI Express lanes
PCI Express
connector one x16
connector size 164 pins
connector data width (maximum) 16 PCI Express lanes