It is a slot for things like Graphics cards and sound cards to fit in, its faster than a normal expansion slot and usually a motherboard will have 2-3.
Pci. Pci-e
PCI X stands for Peripheral Component Interconnect Extended. It is used for expansion of 32 bit PCI bus slots. The slots are used to enhance the capabilities of the motherboard.
pci express (PCIe)
PCI AGP PCI-E
Not sayin :P haha
Cnr & pci
Pci amr agp
Expansion cards are generally installed in PCI or PCI-e slots on the motherboard, although it would depend on which type of expansion card you are referring to.
You're face.
USB Firewire Ethernet PCI SATA
PCI - Peripheral Component Interconnect Also newer PCI express x16 These are the expansion slots on newer motherboards introduced after AGP was phased out. Commonly used to support the computers GPU (Graphical processing unit) or the Video Card
PCI slots are primarily used for adding expansion cards to a computer's motherboard. Common components that utilize PCI slots include graphics cards, sound cards, network interface cards (NICs), and storage controller cards. While PCI has largely been replaced by PCIe (PCI Express) in modern systems, older devices may still utilize standard PCI slots for various peripheral functions.