Dell OptiPlex 755 - Manual (Page 79)

supporting one device each
Expansion Bus
Bus type PCI 2.3
PCI Express 1.0A
SATA 1.0A and 2.0
USB 2.0
Bus speed PCI: 133 MB/s
PCI Express x16: 8 GB/s bidirectional speed
SATA: 1.5 Gbps and 3.0 Gbps
USB: 480 Mbps
Cards 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.
PCI: without riser-card cage
connectors two
card size low profile
connector size 120 pins
connector data width
(maximum)
32 bits
PCI Express: without riser-card cage
connectors one x16
card size low profile
power 25 W (maximum)
connector size 164 pins (x16)
connector data width (maximum) 16 PCI Express lanes (x16)
PCI and PCI Express: with optional, full-height
PCI Express riser-card cage, supporting both
low-profile and full-height cards
PCI
connectors two
card size one low-profile card and one full-height card
connector size 120 pins
connector data width
(maximum)
32 bits
PCI Express
connectors one x16
card size full-height
power 25 W maximum
connector size 164 pins (x16)
connector data width (maximum) 16 PCI Express lanes (x16)
PCI only: with optional, full-height PCI riser-
card cage, supporting both low-profile and full-
height cards
connectors three PCI
card size one low-profile card and two full-height cards
connector size 120 pins
connector data width
(maximum) 32 bits
eSATA
Drives
Externally accessible one One eSATA drive (optional)
Internally accessible l two SATA (Serial ATA) hard drives
l one3.5-inch floppy drive or media card reader
l one SATA optical drive
Connectors
External connectors: