Dell Precision T3400 (Late 2007) - Manual (Page 15)

Quick Reference Guide 15
Front View (Desktop Orientation)
4 card slots Access connectors for any installed PCI or PCI Express
cards.
NOTE: The upper five connector slots support full-length
cards; the connector slot at the bottom supports a half-length
card.
NOTE: Check the documentation for cards to ensure that you
can accommodate them in your configuration. Some cards
that require more physical space and power (such as PCI
Express graphics cards) may restrict the use of other cards.
1 upper 5.25-inch drive
bay Supports an optical drive.
2 lower 5.25-inch drive
bay Supports an optical drive or an additional hard drive
(SATA only).
3 3.5-inch drive bay Supports a floppy drive or a Media Card Reader.
4 hard drive activity
light The hard drive activity light is on when the computer
reads data from or writes data to the hard drive. The
light may also be on when a device such as an optical
drive is in operation.
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