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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)