Dell Precision 390 User Manual page 32

Hard drive
Expansion Bus
Bus type
Bus speed
Card slots
PCI:
connectors
connector size
connector data width (maximum)
PCI Express:
connectors
connector size
connector data width (maximum)
PCI Express:
connectors
connector size
connector data width (maximum)
PCI Express:
connectors
connector size
connector data width (maximum)
Drives
Externally accessible:
Available devices
Internally accessible:
Connectors
External connectors:
Serial
Parallel
IEEE 1394a
integrated serial ATA (4), with RAID 0/1/5/10 and
command queuing
integrated ATA-100 (1 channel)
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)
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
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.
three
120 pins
32 bits
one x1
36 pins
1 PCI Express lane
one x4 full-length slot (supports x8, x4, and x1)
98 pins
4 PCI Express lanes
one x16 slot (supports x16 and x1 modes/cards; x8
and x4 modes/cards are not supported)
164 pins
16 PCI Express lanes
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
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
two 3.5-inch hard drive bays
one 9-pin connector (optional 2nd connector);
16550C-compatible
one 25-hole connector (bidirectional)
one front-panel 6-pin serial connector (with optional
card)