Dell Precision 490 Desktop - Manual (Page 21)

Quick Reference Guide
21
Back View (Tower Orientation)
1 power connector Insert the power cable.
2 card slots Access connectors for any installed PCI, PCI-X, or PCI Express cards.
NOTE:
The center four slots support full-length cards: one PCI-X slot, one PCI
Express x8 slot (wired as x4), one PCI Express x16 slot, and one PCI slot); and the top
and bottom slots support half-length cards: one PCI-X slot and one PCI Express x8
slot (wired as x4).
3 back panel connectors Plug serial, USB, and other devices into the appropriate connectors.
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