Summary of the different types of Peripheral Component Interconnect (PCI) standards.
PCI
PCI (Peripheral Component Interconnect) is a type of computer bus for attaching or inserting peripheral devices into a computer. The PCI standard was first proposed by Intel in 1990 and was widely implemented in computers by 1995. Today, the specifications for PCI and its variants are maintained by the PCI-SIG (PCI Special Interest Group), a consortium of over 900 companies.
How to identify the type of PCI bus?
If you want to add expansion cards to your system, you need to know what type of bus interface you need.
This is important because 5V cards are not compatible with 3.3V PCI / PCI-X slots and vice versa.
If you look at the images below you can see that the 32-Bit and 64-Bit slot differ in length.
