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Universal Serial Bus connectors
There are six Universal Serial Bus (USB) 2.0 connectors, two on the front and four
on the rear of the computer. Use the USB connectors to connect optional telephony
and multimedia devices. USB 2.0 technology transfers data at up to 480 Mbps (Mb
per second) with a maximum of 127 external devices and a maximum signal
distance of 5 meters (16 ft) per segment (if the device that is attached to the
computer is a USB 2.0 device). If multiple USB devices are attached to the
computer, the USB hub must be USB 2.0; otherwise, all USB 2.0 devices will
transfer data at 12 Mbps. Using Plug and Play technology, USB devices are
configured automatically. The following illustration shows a USB connector.
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Use a 4-pin USB cable to connect an external devices to a USB connector.
If you connect a PS/2 (non-USB) keyboard to the keyboard connector, USB ports
and devices are disabled during power-on self-test (POST).
If you connect a USB keyboard that has a mouse port, the keyboard emulates a
mouse, and you cannot disable the mouse settings in the Configuration/Setup Utility
program.
Video connector
The PCI Express x16 adapter, which is in PCI slot 1 on the system board, provides
the video connector. This connector is on the rear of the computer. Use the video
connector to connect a monitor or other display device. The following illustrations
show examples of different video connectors.
Analog video connector
1
5
1115
Digital (DVI-I) video connector
1
C1 C2
C3
C5
C4
Dual monitor system-59 (DMS-59) video connector
Some models come with a digital video interface (DVI) connector for connecting a
digital monitor. If you have problems viewing information with a second monitor,
refer to the User’s Guide.
Chapter 4. Installing options 57