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7: Understanding Motherboards
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Step 1 The rst system is going to be based on an Intel processor and has the following requirements:
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Intel Core 2 Duo Extreme processor Intel 975X chipset ATI Cross re multi-graphics processing unit (GPU) support Minimum 4 gigabytes (GB) of dual-channel memory Minimum four serial ATA device support
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Your recommended motherboard to meet these requirements: ________________ Step 2 The second system your client would like speci cations on is going to be based on an AMD processor and has the following requirements: AMD Athlon 64 X2 processor NVIDIA nForce 570 SLI chipset NVIDIA nForce SLI multi-GPU support Minimum 4 GB of dual-channel memory Minimum four serial ATA device support
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Your recommended motherboard to meet these requirements: ________________ Step 3 The nal system your client would like speci cations on is going to be based on two Intel Xeon processors and has the following requirements: Dual Intel Xeon processors Northbridge Intel 5000V Southbridge Intel 6321ESB Minimum 12 GB of dual-channel memory Minimum four serial ATA device support SATA RAID 0/1/5
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Your recommended motherboard to meet these requirements: ________________
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Jonathan is building a system using an Intel Core 2 Duo processor, and he s purchased a new motherboard from ASUS He would like to use an old (but working!) ATX power supply he had lying around to power the system Why might this not be a good idea Keith bought a fancy new case for his system He removed the motherboard from his old case, but discovered it wouldn t t in the new one What did Keith forget to check
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Key Terms Quiz
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Michael is discussing the purchase of a dual Intel Xeon system and asks what on the motherboard would have to be special List some of the items that would need to be present Charlie has just purchased a new system with an ATX motherboard When he attempts to use his older keyboard and mouse, he discovers that there are no PS/2 connectors on the motherboard Is this con guration correct for an ATX motherboard Are there any solutions that would allow Charlie to use his old keyboard and mouse Jeremy wants to upgrade his system by replacing the CPU His friend works at a local computer shop and has offered him a Pentium D processor for a great price Jeremy s current system uses a Pentium 4 254-gigahertz (GHz) CPU Will this work Why or why not
Key Terms Quiz
Use the following vocabulary terms to complete the sentences that follow Not all of the terms will be used
AT ATX BTX chipset CPU socket FlexATX microATX motherboard book P1 power connector P4 power connector P8/P9 power connector
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One of the most important considerations when choosing a motherboard is whether you will use an Intel or an AMD processor, and then choosing the correct _______________ To check the technical speci cations of a motherboard, consult its _________________ The ____________ motherboard was the rst motherboard to offer soft power The northbridge and southbridge are components of a motherboard s ___________ One motherboard design has recon gured the components and layout to maximize the cooling properties of the system; this is known as the _______________ motherboard
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Lab Exercises
801 Working with Electricity
Understanding Powering PCs
802 Meaning Power Supply Output Lab Analysis Test Key Terms Quiz
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8: Understanding Powering PCs
The term power supply is somewhat misleading After all, the power
supply in a PC does not actually supply power; it just takes the alternating current (AC) supplied by the power company and converts it to the direct current (DC) used by the computer system Local power companies supply AC to the outlet in your home or of ce, and some conversion must take place to supply the lower operating voltages and DC power required for the PC to function As a PC technician, you need to understand the difference between AC and DC power You should be able to measure the AC power at the wall outlet and determine whether the hot, neutral, and ground wires are properly connected You must also measure the DC output of the power supply inside the PC case to determine whether the power supply is providing the correct DC voltage The power supply in a PC is an electronic device that converts the higher voltage 120 volts of alternating current (VAC) in the United States or 240 VAC outside of the United States into the three power levels of 12 VDC, 5 VDC, and 33 VDC used in today s PC systems The 12 VDC is traditionally used for devices that have motors to spin, such as hard disk drives, oppy disk drives, CD-ROM drives, and cooling fans The 5 VDC and 33 VDC usually support all of the onboard electronics Modern central processing units (CPUs) often use less than 33 VDC, so there are further step-down regulators and lters to provide core voltages as low as 14 VDC In the next two labs, armed with an outlet tester, a digital multimeter, and fresh wits about you, you will practice the procedures for measuring the power provided by the electric company (the power going to the PC) and verify the voltages provided by a working PC power supply
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