© Cengage Learning 2014 A+ Guide to Managing & Maintaining Your PC, 8th Edition 1 Figure 1-2 Inside the computer case

© Cengage Learning 2014A+ Guide to Managing & Maintaining Your PC, 8th Edition

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Figure 1-2 Inside the computer case


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Figure 1-18 This MicroATX motherboard by Biostar is designed to support an AMD processor


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Figure 4-3 A Mini-ITX motherboard


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Figure 4-10 The chipset’s North Bridge and South Bridge control access to the processor for all components


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Buses and Expansion Slots

• Bus– System of pathways used for communication

• Carried by bus: – Power, control signals, memory addresses, data

• Data and instructions exist in binary– Only two states: on and off

• Data path size: width of a data bus– Examples: 8-bit bus has eight wire (lines) to transmit


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Figure 4-16 A data bus has traces or lines that carry voltage interpreted by the CPU and other devices as bits

© Cengage Learning 2014

Buses and Expansion Slots

• System clock (system timer) – times activities on the motherboard

• Speed of memory, Front Side Bus, processor, or other component is measured in hertz (Hz), which is one cycle per second– Megahertz (MHz): one million cycles per second– Gigahertz (GHz): one billion cycles per second

• Motherboards can have more than one bus– Table 3-4 on the following slide lists many buses

A+ Guide to Managing & Maintaining Your PC, 8th Edition

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Figure 4-21 Three types of PCIe slots and one conventional PCI slot


What’s Inside the Case

• Expansion cards - also called adapter cards– A circuit board that provides more ports than those

provided by the motherboard– Today, most ports are provided by motherboards


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Figure 1-4 Ports providedby a motherboard


What’s Inside the Case

• Memory modules – random access memory (RAM)– Temporary storage for data and instructions as they

are being processed by the CPU– Dual inline memory module (DIMM) slots hold

memory modules


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Figure 1-6 A DIMM holds RAM and ismounted directly ona motherboard


Drives, Their Cables, and Connectors

• Hard Drives– Two standards:

• Serial ATA standard (SATA)– Used by most drives today

• Parallel ATA (PATA) – slower than SATA– Also called IDE interface– Uses 40-pin ribbon cable and connector– Two connectors on a motherboard for two data cables– Accommodates up to four IDE devices– Uses a 4-pin power connector called a Molex power

connector


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Documents

© Cengage Learning 2014 A+ Guide to Managing & Maintaining Your PC, 8th Edition 1 Figure 1-2 Inside the computer case