Cạc video: các câu hỏi thường gặp


Here are answers to some common questions about video cards, which are also commonly referred to as graphics cards.

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What is a video card?

A video card (also known as a display adapter, video adapter, graphics adapter, or graphics card) is a hardware device installed inside a computer that's used to connect a monitor to the computer and send display information to the monitor.

How do I find out what kind of video card my computer has?

  1. Open Screen Resolution by clicking the Start button Picture of the Start button, clicking Control Panel, and then, under Appearance and Personalization, clicking Adjust screen resolution.

  2. Click Advanced settings, and then click the Adapter tab.

    This is where you can see details about your video card, including what kind of video card your computer has.

    Note

    • Laptops don't have video cards. Laptops either have integrated graphics or a graphics processing unit (GPU) built into the computer in place of a video card.

How do I find out how much memory my video card has?

  1. Open Screen Resolution by clicking the Start button Picture of the Start button, clicking Control Panel, and then, under Appearance and Personalization, clicking Adjust screen resolution.

  2. Click Advanced settings, and then click the Adapter tab.

    This is where you can see details about your video card, including how much memory your video card has.

What are integrated graphics?

Many computers today come with integrated graphics in place of a video card. These are graphics processors that are integrated with your computer's motherboard. Laptops either have integrated graphics or a graphics processing unit (GPU) built into the computer instead of a video card.

Integrated graphics are getting more powerful all the time, but a dedicated video card or GPU still have more power—and often a lot more power. Integrated graphics often use some of your random access memory (RAM), reducing the amount of memory available for your computer to use.

What are discrete graphics?

Discrete graphics is a term sometimes used to describe computers that have a dedicated video card rather than integrated graphics.

Can I upgrade my video card?

Yes, you can replace the video card in any computer that has an existing video card. However, many desktop computers no longer come with a video card—and no laptops have them. These computers come with integrated graphics in place of a video card. These are graphics processors that are integrated with your computer's motherboard, which can't be upgraded.

If your computer uses a video card, you can upgrade the video card by removing the original card and replacing it with a new one. Before installing a video card, check the information that came with it. Also, be sure to check the information that came with your computer to see if opening your computer case affects the computer's warranty coverage.

For more information about upgrading your video card, see Give your PC some graphics muscle by installing a new video card.

How do I update the driver for my video card?

You can have Windows automatically download recommended drivers for all of your hardware, including your video card. This is a good way to make sure your video card driver stays up to date and works properly. To make sure you get all the drivers available from Windows Update, see Automatically get recommended drivers and updates for your hardware.

Note

  • Video card manufacturers often release updates to their drivers to enhance performance or fix compatibility issues with new games. If you want the latest driver for your video card from the manufacturer, visit the support page on the manufacturer's website for information on how to download and install the newest driver. Make sure you download a version of the driver for this version of Windows.

What is video acceleration?

Video acceleration, also referred to as 3D acceleration, uses a graphics processing unit (GPU) on the video card to speed the display of text and graphics on the screen, and to enable graphic effects such as transparency and simulated lighting. The video acceleration features of your video card determine how quickly things are drawn on the screen, and whether you can use all of the graphic effects available in Windows, games, and other programs.

Can I use more than one video card in my computer?

Yes, some computers allow you to plug in two or more video cards, each connected to its own monitor. Other computers allow you to pair video cards for display on a single monitor to increase performance, using technologies such as NVIDIA SLI or ATI CrossFire. Check with the manufacturer to see if your computer has the necessary hardware to support multiple video cards.

Can I connect more than one monitor to my video card?

This depends on your video card. The easiest way to determine if your video card supports multiple monitors is to look at the back of your computer and see if your card has two or more video ports for connecting multiple monitors.

Illustration of VGA and DVI ports
VGA and DVI ports

You can extend your Windows desktop across more than one monitor by plugging two or more monitors into a video card with multiple video ports. Most laptops allow you to connect one external monitor and extend your desktop there from your laptop screen. For more information, see Move windows between multiple monitors.

What is a video capture card?

You can use a video capture card to display or record video from sources such as VCRs and camcorders. Many video capture cards don't support connection to a monitor, but instead require that your system also contain a standard video card.



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