Dell 400 Owner's Manual page 113

Drives
Externally accessible:
Available devices
Internally accessible:
Connectors
External connectors:
IEEE 1394
Video
Network adapter
USB
Audio
System board connectors:
Primary IDE drive
Serial ATA
FlexBay Drive
Fan
PCI
PCI Express x1
PCI Express x4
PCI Express x16
two 3.5-inch drive bays (FlexBay)
two 5.25-inch drive bays
serial ATA drives (2), floppy drive, USB memory devices, CD drive,
CD-RW drive, DVD drive, DVD-RW drive, Media Card Reader,
and DVD/CD-RW combo drive
two 3.5-inch hard-drive bays
one front-panel 6-pin serial connector (with optional card)
15-pin VGA connector
28-pin DVI connector
RJ-45 connector
two front-panel and five back-panel USB 2.0-compliant connectors
five back-panel connectors for line-in, line-out, microphone,
surround, and center/Low Frequency Effects (LFE) channel; two
front-panel connectors for headphones/microphone
40-pin connector on PCI local bus
four 7-pin connectors
USB 10-pin header for optional floppy drive or optional Media
Card Reader (3.5-inch bay devices)
5-pin connector
three 120-pin connectors
36-pin connector
98-pin connector
164-pin connector
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Appendix