Dell OptiPlex GX620 - Manual (Page 143)

Drives two serial ATA controllers supporting one device each
and one parallel Ultra ATA/100 IDE supporting two
devices per channel with one channel
Expansion Bus
Bus type PCI 2.3
SATA 1.0a and 2.0
USB 2.0
PCI Express 1.0a
Bus speed PCI: 33 MHz
SATA: 1.5 Gbps and 3.0 Gbps
USB: 480 Mbps
PCI Express x1: 5 Gbps
PCI Express x16: 80 Gbps
Cards half-length, full-height cards supported with optional
riser-card cage
Default: no riser-card cage low-profile cards supported
PCI
connectors two
card size low profile
connector size 120 pins
connector data width
(maximum)
32 bits
PCI Express
connectors one x16
card size low profile
power 25 W maximum
connector size 120 pins (x16)
connector data width (maximum) 16 PCI Express lanes (x16)
Optional: full-height PCI Express riser-card cage low-profile and full-height cards supported
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 120 pins (x16)
connector data width (maximum) 16 PCI Express lanes (x16)
Optional: full-height PCI riser-card cage low-profile and full-height cards supported
PCI
connectors three
card size one low-profile card and two full-height cards
connector size 120 pins
connector data width
(maximum)
32 bits
Drives
Externally accessible one 3.5-inch drive
one bay for CD/DVD or optional second hard drive
Internally accessible one bay for a 1-inch-high hard drive
Connectors
External connectors:
Serial 9-pin connector; 16550C-compatible
Parallel 25-hole connector (bidirectional)