Dell Precision 620 Manuel d'utilisateur télécharger pdf (Page 64)

USB

Universal Serial Bus. A USB connector provides a single connection point for multiple USB-compliant devices, such as mice, keyboards, printers,

and computer speakers. USB devices can also be connected and disconnected while the system is running.

utility

A program used to manage system resources—memory, disk drives, or printers, for example.

UTP

unshielded twisted pair

volt(s)

VAC

volt(s) alternating current

VCCI

Voluntary Control Council for Interference

VCR

videocassette recorder

VDC

volt(s) direct current

VESA

Video Electronics Standards Association

VGA

video graphics array. VGA and SVGA are video standards for video adapters with greater resolution and color display capabilities than previous

standards.

To display a program at a specific resolution, you must install the appropriate video drivers and your monitor must support the resolution. Similarly,

the number of colors that a program can display depends on the capabilities of the monitor, the video driver, and the amount of memory installed

for the video adapter.

VGA feature connector

On some systems with an integrated VGA video adapter, a VGA feature connector allows you to add an enhancement adapter, such as a video

accelerator, to your computer. A VGA feature connector can also be called a VGA pass-through connector.

video adapter

The logical circuitry that provides—in combination with the monitor—your computer's video capabilities. A video adapter may support more or

fewer features than a specific monitor offers. Typically, a video adapter comes with video drivers for displaying popular application programs and

operating systems in a variety of video modes.

On some Dell computers, a video adapter is integrated into the system board. Also available are many video adapter cards that plug into an

expansion-card connector.

Video adapters often include memory separate from RAM on the system board. The amount of video memory, along with the adapter's video

drivers, may affect the number of colors that can be simultaneously displayed. Video adapters can also include their own coprocessor for faster

graphics rendering.

video driver

A program that allows graphics-mode application programs and operating systems to display at a chosen resolution with the desired number of

colors. A software package may include some "generic" video drivers. Any additional video drivers may need to match the video adapter installed

in the computer.

video memory

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Dell Precision 620 Manuel d'utilisateur Page 64

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