Dell Precision R5400 (Mid 2008) - Manual (Page 21)

Specifications
21
Audio
Type integrated ADI 1984 High Definition Audio CODEC
and AC97/High Definition digital controller
Expansion Bus
Bus type PCI 2.3
PCI Express 1.0a
SATA 2.0
USB 2.0
Bus speed/transfer rate PCI: 133 MB/s
PCI Express:
x8 slot bidirectional speed — 500 MB/s
x16 slot bidirectional speed — 1 GB/s
SATA 1.0 and 2.0: 150 and 300 Mbps per drive
USB 2.0: up to 480 Mbps (high speed)
Expansion slots:
Center riser:
PCI-X
PCI
one full height, full length 3.3 V, 64 bit, 100 MHz
one PCI Universal, full height, full length 5.0 V,
32 bit, 33 MHz
NOTE:
The center riser expansion slot configuration
varies according to the riser installed on your computer.
Center riser:
PCI-X
PCI Express x8 one full height, full length 3.3 V, 64 bit, 100 MHz
one full height, full length x8 lane
NOTE:
The center riser expansion slot configuration
varies according to the riser installed on your computer.
Outer riser:
PCI Express x16 (two
slots) two full height, full length x16 lane