Dell OptiPlex GX745 User'smanual page 57

Bus type
Bus speed
Cards
Default: no riser-card cage
PCI
connectors
card size
connector size
connector data width
(maximum)
PCI Express
connectors
card size
power
connector size
connector data width (maximum)
Optional: full-height PCI Express riser-card cage
PCI
connectors
card size
connector size
connector data width
(maximum)
PCI Express
connectors
card size
power
connector size
connector data width (maximum)
Optional: full-height PCI riser-card cage
PCI
connectors
card size
connector size
connector data width
(maximum)
Drives
Externally accessible
Internally accessible
Connectors
External connectors:
Serial
Parallel
Video
Network adapter
Optional PS/2 with secondary serial port
adapter
USB
PCI 2.3
PCI Express 1.0A
SATA 1.0A and 2.0
USB 2.0
PCI: 133 MB/s
PCI Express x16: 8 GB/s bidirectional speed
SATA: 1.5 Gbps and 3.0 Gbps
USB: 480 Mbps
half-length, full-height cards supported with optional
riser-card cage
low-profile cards supported
two
low profile
120 pins
32 bits
one x16
low profile
25 W maximum
120 pins (x16)
16 PCI Express lanes (x16)
low-profile and full-height cards supported
two
one low-profile card and one full-height card
120 pins
32 bits
one x16
full-height
25 W maximum
120 pins (x16)
16 PCI Express lanes (x16)
low-profile and full-height cards supported
three
one low-profile card and two full-height cards
120 pins
32 bits
one 3.5-inch drive
one bay for optical drive or optional second hard
drive
one bay for a 1-inch-high hard drive
9-pin connector; 16550C-compatible
25-hole connector (bidirectional)
15-hole VGA connector
RJ45 connector
two 6-pin mini-DINs
two front-panel and six back-panel USB 2.0–
compliant connectors