What is conventional PCI?
PCI stands for Peripheral Component Interconnect. PCI is a parallel bus architecture developed in 1992 for desktop and server applications. PCI slots are provided for the Expansion Cards. Expansion cards like Graphics Card, TV Tuner Card, USB Card provide you more facilities.
PCI has evolved into several variations (PCI, PCI-X, PCMCIA, CardBus, CompactPCI, etc.), all parallel bus technologies, to meet the specific requirements of its many applications.
At least 3 or 4 PCI connectors are generally present on motherboards and can generally be recognized by their standardized white color.
The PCI interface exists in 32 bits with a 124-pin connector or in 64 bits with a 188-pin connector. There are also two signaling voltage levels:
- 3.3V, for laptop computers
- 5V, for desktop computers
The signaling voltage does not equal the voltage of the motherboard power supply but rather the voltage threshold for the digital encryption of data.
There are 2 types of 32-bit connectors:
- 32-bit PCI connector, 5V:
- 32-bit PCI connector, 3V:
The 64-bit PCI connectors offer additional pins and can accommodate 32-bit PCI cards. There are 2 types of 64-bit connectors:
- 64-bit PCI connector, 5V:
- 64-bit PCI connector, 3.3V: