It holds your CPU and chipset, and provides a common interface for other components of the computer. A PCI slot is just an extension of this purpose. PCI stands for Peripheral Component Interface (or interconnect, depending on who you talk to). This means that it allows you to insert expansion cards into your computer.
Consequently, what is a PCI bus used for?
Conventional PCI, often shortened to PCI, is a local computer bus for attaching hardware devices in a computer. PCI is the initialism for Peripheral Component Interconnect and is part of the PCI Local Bus standard.
Do all motherboards have a PCI Express slot?
Typically they will all be PCI Express, but for a graphics card you need a PCI Express x16 slot. There are three versions of this slot, but they're backwards compatible, so a modern PCI Express 3.0 graphics card will work in a motherboard with a PCI Express x16 2.0 slot. This motherboard has two PCI Express x16 slots.
What does PCI slots stand for?
Stands for "Peripheral Component Interconnect." It is a hardware bus designed by Intel and used in both PCs and Macs. Most add-on cards such as SCSI, Firewire, and USB controllers, use a PCI connection. Some graphics cards use PCI, but most new graphics cards connect to the AGP slot.