Dell Precision 390 - Manual (Page 32)

Hard drive integrated serial ATA (4), with RAID 0/1/5/10 and
command queuing
integrated ATA-100 (1 channel)
Expansion Bus
Bus type three PCI 2.2
one PCI Express x16 up to 150 W
one PCI Express x8, wired as x4
one PCI Express x1
eight USB 2.0 (2 front, 5 back, 1 internal)
Bus speed PCI: 33 MHz
PCI Express:
x1 slot bidirectional speed - 500 MB/s
x 4 slot bidirectional speed - 2 GB/s
x16 slot bidirectional speed - 8 GB/s
Card slots The upper five connector slots support full-length
cards, and 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.
PCI:
connectors three
connector size 120 pins
connector data width (maximum) 32 bits
PCI Express:
connectors one x1
connector size 36 pins
connector data width (maximum) 1 PCI Express lane
PCI Express:
connectors one x4 full-length slot (supports x8, x4, and x1)
connector size 98 pins
connector data width (maximum) 4 PCI Express lanes
PCI Express:
connectors one x16 slot (supports x16 and x1 modes/cards; x8
and x4 modes/cards are not supported)
connector size 164 pins
connector data width (maximum) 16 PCI Express lanes
Drives
Externally accessible: one 3.5-inch drive bay (FlexBay) in desktop
orientation, or two 3.5-inch drive bays (FlexBay) in
tower orientation
two 5.25-inch bays
Available devices serial ATA drive, SAS drive, floppy drive, Media Card
Reader, USB memory devices, CD drive, CD-RW drive,
DVD drive, DVD+RW drive, and DVD and CD-RW
combo drive
Internally accessible: two 3.5-inch hard drive bays
Connectors
External connectors:
Serial one 9-pin connector (optional 2nd connector);
16550C-compatible
Parallel one 25-hole connector (bidirectional)
IEEE 1394a one front-panel 6-pin serial connector (with optional
card)