Motherboard

There are primarily two types of motherboards, AT motherboard, and ATX motherboard. AT motherboards are older, and not commonly used now a days. The AT and ATX motherboards differ in the form factor. Full AT is 12 dewy-eyed x 13.8 deep, and Baby AT is 8.57 astray x 13.04 deep. Full-ATX is 12 wide x 9.6 deep and Mini-ATX is 11.2 wide x 8.2 deep. Other major differences include power issue connection, and keyboard connector. AT has 5-pin large keyboard connector, where as ATX has 6-pin mini connector. Similarly, AT has genius row two connectors +/-5V, and +/-12V, whereas ATX motherboard has double row single connector providing +/-5V, +/-12V, and +3.3V.

A typical ATX PC motherboard with constituent components is given downstairs:


The important constituent components of an ATX Motherboard are given below:

1. creep & keyboard
2.USB
3.Parallel port
4.CPU Chip
5.RAM time slots
6.floppy disk controller
7.IDE controller
8.PCI slot
9.ISA slot
10.CMOS Battery
11.AGP slot
12.CPU slot
13.Power supply plug in

1. Mouse & keyboard: Keyboard Connectors are two types basically. All PCs adopt a Key board port connected directly to the motherboard. The oldest, precisely still quite common type, is a special DIN, and near PCs until recently retained this style connector.



The AT-style keyboard connector is quickly disappearing, beingness replaced by the smaller mini DIN PS/2-style keyboard connector.

You discount use an AT-style keyboard with a PS/2-style socket (or the other way around) by using a converter. Although the AT connector is unique in PCs, the PS/2-style mini-DIN is also used in more late PCs for the mouse. Fortunately , most PCs that use the mini-DIN for both the keyboard and mouse all the way mark each mini-DIN socket as to its correct use. Some keyboards have a USB connection, but these are fairly rare compared to the PS/2 connection keyboards.

2. USB (Universal serial bus):
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