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graphics, it redirects those tasks to the GPU, significantly speeding up graphics processing.For users who are primarily doing text-based work, one video card is certainly enough. Computer gamers and users of high-end visualization software, however, often take advantage of the ability to install more than one video card at a time. Two or even three video cards can be used in one system. The two major video chip set manufacturers, Nvidia and AMD, have each developed their own standards supporting the combining of multiple video cards. For Nvidia, this standard is named SLI; for AMD, it is called CrossFire X. When the system is running at very highvideo resolutions, such as 1920 × 1200 or higher, multiple video cards working together provide the ultimate in performance. If you’re buying a new system and might be interested in employing multiple video cards, be sure to check whether the motherboard supports SLI or CrossFire X. Working with multiple monitors is useful if you often have more than one application running at a time or even if you just want to expand your gaming experience. Some video cards can support up to six monitors from a single card. The AMD Radeon graphics cards, for example, let you merge all six monitors to work as one screen or to combine them into any subset—for example, displaying a movie on two combined screens, Excel on one monitor, Word on another, and a browser spread across the final two. Can I have a 3-D experience from a computer monitor? 3-D panels are available for desktop monitors and for some laptops. Using the 3-D wireless vision glasses included with the panels, the glasses make existing games or 3-D movies display in stereoscopic 3-D.Intel used fiber optics—the transmission of digital data through pure glass cable as thin as human hair—to develop Thunderbolt. And Thunderbolt supplies much more power to devices than the USB 3.0 standard allows.6.10 Describe the features of sound cards. - Speakers and a sound card - 3-D sound technologyMany computers ship with a 3-D sound card. 3-D sound technology is better at convincing the human ear that sound is omnidirectional, meaning that you can’t tell from which direction the sound is coming. This tends to produce a fuller, richer sound than stereo sound. However, 3-D sound is not surround sound- Surround sound- Dolby Digital 7.169
Surround sound is a type of audio processing that makes the listener experience sound as if it were coming from all directions by using multiple speakers. The current surround-sound standard is from Dolby. There are many formats available, including Dolby Digital EX and Dolby Digital Plus for high-definition audio. Dolby TrueHD is the newest standard. It features high-definition and lossless technology, which means that no information is lost in the compression process. To create surround sound, another standard, Dolby Digital 7.1, takes digital sound from a medium (such as a Blu-ray disc) and reproduces it in eight channels. Seven channels