What is PCI

PCI Pedia: PCI is a parallel bus architecture developed in 1992 for desktop and server applications. PCI slots allow you to add expansion cards such as graphics card, TV card, USB card, etc.

PCI has been developed in many variations such as PCI, PCI-X, PCMCIA, CardBus and CompactPCI to meet the specific needs of your many applications.

Interesting: What is PCI-Express

At least 3 or 4 PCI connectors are usually present on motherboards and can usually be recognized by their standard white color.

The PCI interface can be found in 32-bit with a 124-pin connector or 64-bit with a 188-pin connector.

PCI Pedia: What does PCI mean?

PCI Pedia: PCI comes from the acronym in English Peripheral Component Interconnect which means Peripheral Component Interconnection .

What is it for?

PCI Pedia: PCI cards are used to extend the functionalities of the equipment. The main function is to be able to connect video cards, sound cards, Ethernet ports, wireless cards (wifi) and even additional USB ports.


It comes in two voltage levels:

  • 3.3V, for personal computers or laptops
  • 5V, for desktop computers

The voltage for the peripheral component is not the same as the motherboard voltage, but rather the voltage for the digital encoding of the data.



Connector types

PCI Pedia: There are 2 types of 32-bit connectors:

  • 32-bit connector de 5V:
    32-bit 3V connector:
    The 64-bit connectors have extra pins and can accommodate 32-bit cards. There are 2 types of 64-bit connectors:
  • 64-bit connector de 5V:
    64-bit connector of 3.3V



PCI Pedia: Device Drivers

PCI Pedia: If you’re looking for PCI drivers, you may need to download them to get a specific device to work. For example, if you need a driver for a PCI Ethernet adapter, you’ll need to install the drivers for the network card. You will need the brand and model to be able to search for and download the corresponding driver depending on the operating system installed on your computer.

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