Учебное пособие состоит из двух частей и англо-русского словаря. Материалом для пособия послужило американское издание для изучающих компьютер P. Norton "Introduction to Computers"
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Memory and Computing PowerThe amount of RAM in a computer can have a profound effect on the computer's power. More RAM means the computer can use bigger, more powerful programs, and those programs can access bigger data files. More RAM also can make the computer run faster. The computer does not necessarily have to load an entire program into memory to run it. However, the greater the amount of the program that fits into memory, the faster the program runs. For example, a PC with 16 MB of RAM is able to run Microsoft Windows 98, even though the program actually occupies about 195 MB of disk storage space. When you run Windows, the program does not need to load all its files into memory to run properly. It loads only the most essential parts into memory. When the computer needs access to other parts of the program on the disk, it can unload, or swap out, nonessential parts from RAM to the hard disk. Then the computer can load, or swap in, the program code or data it needs. While this is an effective method for managing a limited amount of memory, it can result in slow system performance because the CPU, memory, and disk are continuously occupied with the swapping process. If your PC has 64 MB of RAM (or more), you will notice a dramatic difference in how fast Microsoft Windows 98 runs because the CPU will need to swap program instructions between RAM and the hard disk much less often. If you own a PC and decide that it needs more RAM, you should be able to buy more, open up your computer, and plug it in. (Some newer PCs come "stuffed" with all the RAM they can hold, making it difficult to upgrade.) In some computers, chips are usually grouped together on small circuit boards called single in-line memory modules (SIMMs) or dual in-line memory modules (DIMMs). Each SIMM or DIMM can hold between 1 MB and 64 MB of RAM and connects to the motherboard with 30-pin, 72-pin, or 168-pin connections. In newer computers both these modules are replaced by DDR и DDR II types that can hold up to 2 Gb of RAM. The cost of upgrading the memory of a computer has actually gone down, so upgrading RAM is often the most cost-effective way to get more speed from your computer. жүктеу/скачать 0,7 Mb. Достарыңызбен бөлісу:
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