A modern computer can easily contain more than half a dozen different types of memory, including two or three types of cache RAM, the main system RAM, the motherboard BIOS ROM, RAM on a video card, and ROMs on a variety of expansion cards. Many of these memory types are best understood in the context of their specific devices, such as the ROM and RAM on video cards.
The main system memory itself is a fairly complex topic, because so many different types of memory have been used over the years—FPM DRAM, EDO DRAM, SDRAM, and RDRAM; distributed on SIMMs, DIMMs, and RIMMs; with varying speeds, sizes, and so on. Matching the RAM to the motherboard is one of the most important tasks you can undertake when you build a computer or upgrade the RAM in an existing computer. The most important thing you can do in making this match is to read your motherboard's manual.
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Read how to maintain and repair any desktop and laptop computer. This Ebook has articles with photos and videos that show detailed step by step pc repair and maintenance procedures. There are many links to online videos that explain how you can build, maintain, speed up, clean, and repair your computer yourself. Put the money that you were going to pay the PC Tech in your own pocket.