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High-end PCs usually come straight from the factory equipped with hefty amounts of RAM One of the areas where makers of lower-cost PCs cut corners is by skimping on RAM
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Your rst task in performing a RAM upgrade is determining how much RAM you need Start by nding out how much RAM is currently installed on the system, and then consult with the motherboard book to determine how much RAM the system can support
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Lab Exercise 401: Determining the Amount of RAM in Your PC
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In this lab exercise, you ll use various methods to determine how much memory is currently installed in your system and how much it is capable of holding At the end of this lab, you will be able to Understand where to nd RAM measurements Identify how much RAM is installed in a system Determine how much RAM a particular motherboard supports
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The materials you need for this lab are A working computer running Windows A notepad
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If you re in a computer lab, or if you have access to multiple PCs, you should practice on as many different PCs as possible
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Getting Down to Business
There are several ways to determine how much RAM is installed on a PC First, you can check the RAM count during boot-up (some of the newer computers hide the RAM count, even if enabled in basic input/output system [BIOS]) This tells you how much RAM the system BIOS recognizes during its check of the system Second, you can check the amount of RAM that Windows recognizes from within the operating system And third, you can remove the PC case cover and physically examine the RAM sticks installed on the motherboard
Cross-Reference
To review the ways you can check the amount of RAM installed in a PC, refer to the Determining Current RAM Capacity section in 4 of Mike Meyers A+ Guide to Managing and Troubleshooting PCs, Vol 1: Essentials
Step 1 Turn on your PC, and watch the display as the system goes through its start-up routine Typically, the RAM count runs near the upper-left side of the screen Figure 4-1 shows an example of a typical RAM count
4: Understanding RAM
FIGURE 4-1 Viewing a typical RAM count during boot-up
Most BIOS programs display the RAM count in kilobytes (KB) To convert this gure to megabytes (MB), divide it by 1024 Many systems run through the start-up routine quickly, so the RAM count may only appear on the screen for a few seconds Press the PAUSE/BREAK key to pause the boot process so that you have time to write down the number accurately When you want the count to restart, press the ENTER key What is the RAM count number displayed on your monitor __________________________________________________
Hint
If you re starting the PC for the first time that day, the start-up routine may run through the RAM count before the monitor has a chance to warm up If this happens, just reboot the PC and try again
Depending on your system s BIOS, you may also see a RAM count in the system con guration summary This is a screen that lists the PC s CPU type and clock speed, mass storage devices, port addresses, and so on Typically, you ll also see an entry for the system s base memory (640 KB) and extended memory (the total amount of RAM installed) Step 2 Use the following methods to determine the amount of RAM on your system from within any version of Windows: a) Right-click the My Computer icon, and select Properties to see the amount of RAM in your system (see Figure 4-2)
Lab Exercise 401: Determining the Amount of RAM in Your PC
FIGURE 4-2 Viewing the RAM count in Windows XP via My Computer
You ll notice that Windows shows RAM as megabytes instead of kilobytes, but the numbers add up to the same total amount
Are all the amounts of RAM correlating If you have 512 MB or 1 gigabyte (GB) of memory installed, are the displayed gures correct, or are they off by 32 MB or 64 MB Entry-level PCs and laptops often have onboard display adapters (the display adapter is built into the motherboard) Manufacturers will include little to no video RAM on the motherboard, so the display adapter must steal some portion of the system RAM to be able to handle today s intense graphic applications If the numbers are not adding up, and you re seeing numbers like 448 MB or 992 MB, your system has probably allocated some of its memory to handle your display adapter s needs
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