Friday, April 3, 2009

Computer Sound & Graphic Card

What is sound card

• Sound cards are special expansion cards enabling computers to play audio.

• Consist of one or more chips used to convert digital sound data to analog sounds played through the speakers.

• 2 types of sound card :

a. built-in sound card

b. sound card in the motherboard.

Built-in sound card

• Built-in on the computer system.

• External speakers are not required.
Sound card on the motherboard

• And external speaker are required.

• The sound jack(PS/2 for speaker) are needed to connect the external speaker and the motherboard.

• All the PCs used these sound cards.

• Used for laptop/notebook

Graphic Card

• Enable to use Graphic Standard.

• To appear the video graphic on the screen

What is a Bus?

• Signal Pathways

• A way of passing information between components inside and outside the computer.

• A modular way of expanding the functions or capabilities of the computer.

PC Bus Architectures

• VL-Bus
• PC Card

Peripheral Component Interconnect (PCI)

• Developed for Pentium-class processors
• 32-bit and 64-bit data path versions
• 33-MHz Clock
• Processor Independent
• Plug and Play with Bus Mastering

Accelerated Graphics Port (AGP)

• Developed for high speed graphics cards
• Frees the PCI bus from making video transfers
• Used only for video cards
• Considered a port rather than a bus
• 66 MHz, 32-Bit

Computer Cooling

• Cooling vents are usually in the front and rear of the case, but in some newer cases can be elsewhere as well.

• These allow air to be circulated by the power supply fan and any auxiliary fans used by the case.

• The most common location of additional cooling fans is the front of the case, opposite the main power supply fan, but some larger cases have cooling fan mounting locations in many places.

• These cases use plastic ducts or tubes to concentrate air flow in a specific direction, which may help the fans do a better job than would be accomplished through standard case air convection.

• The devices that require the cooling aspects :

1. Processor
2. Computer case

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