Dell Precision 450 - Manual (Page 89)

Expansion Bus
Bus type Dual PCI-X 1.0 (3.3 V only), PCI 2.2 (3.3 V/5.0 V)
AGP Pro 3.0 (1.5 V only)
Bus speed PCI: 33 MHz; PCI-X: 66/100 MHz
AGP Pro: 66 MHz
Expansion-card connectors: Dell Precision 650 computer — Three PCI-X
connectors, two PCI slots, and one AGP 8x Pro110
connector
Dell Precision 450 computer — One PCI-X connector,
two PCI slots, and one AGP 8x Pro50 connector
Drives
Externally accessible:
Dell Precision 650 computer one 3.5-inch drive bay
three 5.25-inch drive bays
Dell Precision 450 computer one 3.5-inch drive bay
two 5.25-inch drive bays
Internally accessible:
Dell Precision 650 computer three bays for three 1-inch high or two 1.6-inch high
hard drives
NOTE: You can purchase a conversion bracket from
Dell that allows you to use a 5.25-inch drive bay as
an additional hard drive bay.
Dell Precision 450 computer two bays for two 1-inch high or one 1.6-inch high
hard drives
Connectors
External connectors:
Serial two 9-pin connectors; 16550-compatible
Parallel one 25-hole connector (bidirectional)
IEEE 1394 Dell Precision 650 computer only — Two 6-pin serial
connectors
Video 15-hole connector (on add-in video card)
Network connector RJ45 connector
PS/2 (keyboard and mouse) 6-pin mini-DIN connector
USB two USB 2.0-compliant connectors on the front panel;
four USB 2.0-compliant connectors on the back panel
Audio Dell Precision 650 computer— Three connectors for
line-in, line-out, and microphone on back panel; one
speaker/headphone and one microphone connector
on the front panel
Dell Precision 450 computer— Three connectors for
line-in, line-out, and microphone on back panel; one
speaker/headphone on the front panel
System Board Connectors:
Primary IDE channel 40-pin connector
Secondary IDE channel 40-pin connector
Floppy drive 34-pin connector
SCSI 68-pin connector (Dell Precision 650 computer only)
CD drive audio interface 4-pin connector
Telephony (TAPI) 4-pin connector
Fans (3) 3-pin connector
I/O panel 34-pin connector
USB/IEEE 1394 16-pin connector
Key Combinations
starts embedded system setup (during start-up only)