Dell Precision 490 - Manual (Page 93)

Expansion Bus
Bus type PCI 2.3
PCI Express 1.0A
PCI-X 2.0A
USB 2.0
Bus speed PCI: 133 MB/s
PCI-X: 800 MB/s
PCI Express:
x4/ x8 slot bidirectional speed - 2 GB/s
x16 slot bidirectional speed - 8 GB/s
Card Slots Desktop Mode: Slots 2-4 support full-length cards (1
PCI Express x16 slot, one PCI Express x8 slot, and
one PCI slot), and slots 1, 5, and 6 support half-
length cards (2 PCI-X slots and 1 PCI Express x8
slot).
Tower Mode: Slots 2-5 support full-length cards (1
PCI-X slot, one PCI Express x8 slot, 1 PCI Express
x16 slot, and one PCI slot), and slots 1 and 6 support
half-length cards (1 PCI-X slot and 1 PCI Express x8
slot).
PCI
connector one
connector size 120 pins
connector data width (maximum) 32 bits
PCI-X
connectors two
connector size 188 pins
connector data width (maximum) 64 bits
PCI Express x8 (wired as x4)
connectors two x8 (support x8, x4, and x1 modes/cards;
maximum x4 link width)
connector size 98 pins
connector data width (maximum) 4 PCI Express lanes
PCI Express x16
connector one x16 slot (supports x16, x8, x4 and x1
modes/cards)
connector size 164 pins
connector data width (maximum) 16 PCI Express lanes
Drives
Externally accessible: one 3.5-inch drive bay (FlexBay)
two 5.25-inch drive bays
Internally accessible: two 3.5-inch hard-drive bays
Connectors
External connectors:
Serial two 9-pin connectors; 16550C-compatible
Parallel 25-hole connector (bidirectional)
IEEE 1394 (optional) one front-panel 6-pin connector (with optional card)
Network adapter RJ45 connector
PS/2 (keyboard and mouse) two 6-pin mini-DIN
USB two front-panel and five back-panel USB 2.0–
compliant connectors
Audio two front-panel connectors for microphone and
headphones;
two back-panel connectors for line-in and line-out/
headphones
System board connectors:
IDE drive 40-pin connector
Floppy drive 34-pin connector
Serial ATA five 7-pin connectors
Internal USB 10-pin connector for optional Media Card Reader (3.5-
inch bay device)