Use this connector to attach an external modem, a serial printer, or other devices that use a 9-pin serial
connector.
4
DisplayPort connector (2)
Use this connector to attach a high-performance monitor, a direct-drive monitor, or other compatible
devices.
5
USB 3.0 connectors (4)
Use this connector to attach a USB-compatible device, such as a USB keyboard, mouse, storage drive, or
printer.
6
USB 2.0 connectors (2)
Use this connector to attach a USB-compatible device, such as a USB keyboard, mouse, storage drive, or
printer.
7
Microphone connector
Use this connector to attach a microphone to your computer when you want to record sound or if you use
speech-recognition software.
8
Audio line-out connector
The audio line-out connector is used to send audio signals from the computer to external devices, such as
headphones.
9
Audio line-in connector
The audio line-in connector is used to receive audio signals from an external audio device, such as a stereo
system. When you attach an external audio device, a cable connection is established between the audio line-
out connector of the device and the audio line-in connector of the computer.
10
PCIe card area (different cards provide different connectors)
To improve the operating performance of your computer, you can install or replace Peripheral Component
Interconnect Express (PCIe) cards in this area. Depending on your computer model, the cards installed in this
area might vary.
Note:
A discrete graphics card, a network interface card, or an audio card can be installed in the appropriate
PCIe card slot. If such a card is installed, ensure that you use the connectors on the card instead of the
corresponding connectors on the computer.
12
Ethernet connectors
Connect an Ethernet cable for a local area network (LAN).
Note:
To operate the computer within Federal Communications Commission (FCC) Class B limits, use a
Category 5 Ethernet cable.
13
Cable-lock slots (2)
Used to secure certain cables. See “Attaching a cable lock” on page 30.
14
PS/2 keyboard and mouse connector
(available on some models)
4
P320 User Guide
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