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About Your Computer 39
PCI Express x8 wired as x4
(SLOT1_PCIE)
connectors
one x8 (supports x8, x4, and x1 modes/cards;
maximum x4 link width)
connector size
98 pins
connector data width (maximum)
4 PCI Express lanes
bus transfer rate
2.5 GB/s/lane/direction (raw bandwidth)
PCI Express 2.0 x16
connector
two x16 slots (support x16, x8, x4 and x1
modes/cards)
connector size
164 pins
connector data width (maximum)
16 PCI Express lanes
bus transfer rate
5 GB/s/lane/direction (raw bandwidth)
Ports and Connectors
External connectors
Serial
two 9-pin connectors; 16550C-compatible
Parallel
25-hole connector (bidirectional)
IEEE 1394 (optional)
one front-panel 6-pin connector and one
rear panel 6-pin connector
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
System board connectors
Floppy drive
34-pin connector
Expansion