Parts of a motherboard. January 2001

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This is ...
... my motherboard. From left to right ... motherboard48082.JPG
... the two black connectors ...
... at the left are old ISA slots, now becoming obsolete, that can be useful to connect some old boards, i.e. a LAN board that we keep in the "old but useful devices" drawer.
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The four white connectors ...
... are the PCI slots (numbered from 1 to 4 from left to right). Most of the present boards but the graphics ones, have this kind of connection. The PCI4 is normally only used if the second ISA is not occupied (although electrically both can be used). motherboard480832.JPG
This is the AGP slot ...
... it is only used for graphics boards (where the monitor is plugged). Nowadays, graphics boards are manufactured almost exclusively with this kind of connection
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This is the power supply connector, ATX type ...
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... and so it will be plugged.
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This is the CPU socket ...
... that in this motherboard has to be Intel socket 370 type (PPGA or FCPGA). AMD processors need another kind of motherboard; they are not interchangeable (in this motherboard one cannot even plug Pentium III slot-1)
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And here we come to the headache of my friends who are not very much introduced in the world of computers:...
... the RAM sockets or connectors: the part that is guilty (when short) that computers move as turtles. The three in the photograph at the left are DIMM (black with little white levers at the ends). motherboard48112.JPG
This photograph, that corresponds to other PC 2-3 years old, shows filled...
... its DIMM slots and four empty slots (white) of SIMM memory. When purchasing memories to increase the size (upgrade), one has to report which kind of slot, base speed of CPU clock (for instance, 66, 100 133 Megahertz), and, if possible, show the motherboard's handbook.
A PC ends by becoming a snail, if it has not a MINIMUM of 96-128 Megabytes of RAM with Windows 98, or between 128 and 160 Megabytes of RAM with Windows 2000. motherboard481131.JPG
Going on from down left, this is the famous BIOS, that keeps the code program that starts the PC before the ...
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... operating system load, and this is the battery ...
... that helps to keep the BIOS configuration, clock, ... when the computer is off. Under the battery, in the long black connector, we connect the internal loudspeaker, reset, LED's ...
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