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Chapter 11: Advanced Personal Computers 11Figure 11-6Incompatible CPUs with Similar CapabilitiesFigure 11-7RAM ModuleTo close a stalled application, press Ctrl-Alt-Delete to open the Task Manager. In the window,select the application. Click End Task to close it, as shown in Figure 11-8.When selecting new RAM, you must ensure that it is compatible with the current motherboard.It must also be the same type of RAM as installed in the computer. The speed of thenew RAM must be the same or faster than the existing RAM. It can help to take the originalmemory module with you when you shop for the replacement RAM.
12 IT Essentials: PC Harware and Software Companion GuideFigure 11-8Task ManagerPrimary memory (RAM) is controlled by the OS. Bad RAM will show up in the power-onself test (POST) as not being counted. RAM will only need to be replaced when it is tooslow or insufficiently large enough to accommodate the application. The OS will accommodatethe application by increasing the virtual memory requirement, and hard disk thrashingwill occur.Select Adapter CardsAdapter cards, also called expansion cards, add extra functionality to a computer. Figure11-9 shows some of the adapter cards available. Before you purchase an adapter card, dosome research:■■Is there an open expansion slot?Is the adapter card compatible with the open slot?If the motherboard does not have compatible expansion slots, external devices can be anoption:■■Are USB or FireWire versions of the external device available?Does the computer have an open USB or FireWire port?Consider the following situation for an adapter card upgrade. A customer requires a wirelesscard to connect to the network. The new wireless adapter card must be compatible withthe existing wireless network and with the computer.Investigate wireless network interface cards (NIC) before you purchase one. You shouldensure that the new wireless NIC is compatible with the 802.11 wireless standard beingused on the wireless network.
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iiiTrademark AcknowledgmentsAll ter
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vAbout the Technical ReviewersDavid
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ixIdentify the Names, Purposes, and
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CHAPTER 1Introduction to the Person
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CHAPTER 5Fundamental Operating Syst
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CHAPTER 7Fundamental Printers and S
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CHAPTER 13Advanced Laptops and Port
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CHAPTER 15Advanced NetworksObjectiv
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GlossaryThis glossary defines many
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ase station 3AppleTalk A protocol s
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CMOS battery 5bus topology A networ
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desktop computer 7crosstalk Interfe
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dynamic routing 9Domain Name System
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floppy data cable 11FFast Ethernet
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IEEE 802.11 13Hardware Compatibilit
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media-handling options 17line of si
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ping 21Page Description Language (P
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Regedit 23Printer Control Language
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three-claw part retriever 27surge s
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zero insertion force (ZIF) socket 3
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