The main circuit board inside your computer is called a motherboard. The motherboard contains the connectors for attaching additional boards, such as theCPU, BIOS, memory, mass storage interfaces, serial and parallel ports, expansion slots and all the controllers that are required to control standard peripheral devicessuch as the display screen, keyboard, and hard drive. Collectively, all these chips that reside on the motherboard are known as the motherboard's chipset.
Example of what a physical motherboard
looks like that is inside your computer..
There are different types of motherboards depending on the type of CPU is was deigned to use. Motherboards are divided into categories based on what type of socket it has. Socket 478, for example, is used for Intel Pentium 4 and the Celeron series CPUs. Socket 939 is used for the AMD64 range of processors. It's important to ensure any motherboard you buy will support the type of CPU you want to use in the system. If you already have a CPU you'll need to purchase a motherboard that will accept that same processor. For those building or upgrading a system, you can also invest in a motherboard & CPU combo, which is often cheaper than buying the two components separately and it also ensures compatibility.
It's important to remember that all of the system components must be supported by the motherboard itself. So, if you were to upgrade your memory you can't just search online for "system memory" and buy whatever falls into your price range. You must make sure the type of memory you buy (SDRAM, DDR-SDRAM, RDRAM) and the size (512-MB, 1-GB) is supported by the motherboard.
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