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Chapter 3

Chapter 3

1.A, B, C, E. The motherboard is essential to computer operation in large part because of the two major buses it contains: the system bus and the I/O bus. Together, these buses carry all the information between the different parts of the computer.
2.A, C. Motherboards use expansion slots to provide support for additional I/O devices and high-speed video/graphics cards. The most common expansion slots on recent systems include PCI, AGP, and PCI-Express (also known as PCIe). Some systems also feature AMR or CNR slots for specific purposes.
3.A, B, C, D. SCSI (Small Computer Systems Interface) is a more flexible drive interface than PATA (ATA/IDE) because it can accommodate many devices that are not hard disk drives. Devices are high performance hard drives, image scanners, and removable media, as well as laser printers and CD-ROM/DVD-ROM drives.
4.A, B, C. The ATX family of motherboards has dominated desktop computer designs since the late 1990s. ATX stands for Advanced Technology Extended, and it replaced the AT and Baby-AT form factors developed in the mid 1980s for the IBM PC AT and its rivals. The ATX family includes Mini-ATX and FlexATX.
5.G. Motherboards in both the ATX and BTX families feature a variety of integrated I/O ports, including serial, parallel, USB, PS/2, audio, and Ethernet. These are found in as many as three locations. All motherboards feature a rear port cluster, and many motherboards also have additional ports on the top of the motherboard that are routed to header cables that are accessible from the front and rear of the system.
6.D. The Pentium III processor was the last Intel processor produced in both a slot-based and socket-based design. Slot-based versions use Slot 1, the same slot design used by the Pentium II and slot-based Celeron processors. Socketed versions use Socket 370, which is mechanically the same as the socket used by the first socketed Celeron processors. However, some early Socket 370 motherboards are not electrically compatible with the Pentium III.
7.A. AMD’s first dual-core processor was the Athlon 64 X2, which uses a design that permits both processor cores to communicate directly with each other, rather than using the North Bridge (Memory Controller Hub) as in the Intel Pentium D.
8.B. Hyperthreading is a technology developed by Intel for processing two execution threads simultaneously within a single processor. Essentially, when HT Technology is enabled in the system BIOS and the processor is running a multithreaded application, the processor is emulating two physical processors.
9.C. If the processor has a removable heat sink, fan, or thermal duct that is attached to the motherboard, you must remove these components before you can remove the processor.
10.E. A system that overheats will stop operating, and with some older processors, serious damage can result. Most processors today are fitted with active heat sinks that contain a fan. If the fan stops working, an overheated processor follows.
11.A, C. Heat sink fans don’t have to stop turning to fail; if they turn more slowly than they are specified to run, they can cause processor overheating. So keep them clean. If the heat sink is incorrect for the processor model or if the heat sink is not attached correctly, it can also cause overheating.
12.D. After installing a sound card, you must connect 1/8-inch mini-jack cables from speakers and the microphone to the sound card. Most sound cards use the same PC99 color coding standards for audio hardware that are used by onboard audio solutions.

Troubleshooting Scenario

You have recently purchased a 500GB storage device. You plug it in to your system and nothing happens. What could be the cause of the problem, and how would you correct this?
Answer:In this case you should verify whether the port you have plugged into has been disabled in the system BIOS configuration. If it will not connect, try enabling the port and retry the device.


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