Dell OptiPlex 755 User Manual page 79

Expansion Bus
Bus type
Bus speed
Cards
PCI: without riser-card cage
connectors
card size
connector size
connector data width
(maximum)
PCI Express: without riser-card cage
connectors
card size
power
connector size
connector data width (maximum)
PCI and PCI Express: with optional, full-height
PCI Express riser-card cage, supporting both
low-profile and full-height cards
PCI
connectors
card size
connector size
connector data width
(maximum)
PCI Express
connectors
card size
power
connector size
connector data width (maximum)
PCI only: with optional, full-height PCI riser-
card cage, supporting both low-profile and full-
height cards
connectors
card size
connector size
connector data width
(maximum)
eSATA
Drives
Externally accessible
Internally accessible
Connectors
External connectors:
supporting one device each
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
standard configuration supports low-profile cards
only;
with optional riser-card cage, computer supports half-
length, full-height cards. Full-height cards are
supported in the 6.875-inch riser card cage.
two
low profile
120 pins
32 bits
one x16
low profile
25 W (maximum)
164 pins (x16)
16 PCI Express lanes (x16)
two
one low-profile card and one full-height card
120 pins
32 bits
one x16
full-height
25 W maximum
164 pins (x16)
16 PCI Express lanes (x16)
three PCI
one low-profile card and two full-height cards
120 pins
32 bits
one One eSATA drive (optional)
two SATA (Serial ATA) hard drives
l
one3.5-inch floppy drive or media card reader
l
one SATA optical drive
l