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There are four basic type slots on the mainboard: ISA, PCI, AGP, and
PCI-express. All of these slots are the thicker plastic slots that
are generally lined up side by side. There can be several slots on a
given mainboard.
ISA is the oldest, it will be near the end of the mainboard, it is
long, black, and the metal pins are wider than in any of the other
slots.
PCI is the most basic slot, it tends to be white in color (but can
have other colors in the more custom boards), generally in the middle
of the board (between the end of the board and the cpu) it is of
medium size, that is, it is shorter than the ISA, but longer than the
AGP, and its pins are thin like all of the other slots, other than the
ISA.
The AGP slot tends to be brown or black in color, and a little shorter
than the PCI slots. Since it is meant to be used as a slot for
graphics cards, it is usually placed in the first position, meaning
the position nearest the cpu. Usually, there is only one AGP slot.
The PCI-express card is the latest and newest "style" of slot, it
tends to be white in color, it is a little longer than a regular PCI
slot, and since it tends to be for graphics cards it will also be
first on the board, meaning it is nearest the cpu. Sometimes there
will be a pair of them, or more.
From oldest to newest type of slot they are: ISA, PCI, AGP, PCI-express... |