Expansion slots

Expansion slots allow the user to add or remove expansion cards, such as graphic or sound cards. There are a variety of expansion slot types these include;

• PCI (Pheripheral Component Interconnect)

• PCI Express (Pheripheral Component Interconnect express)
• ISA (Industrial Standard Architecture
• AGP (Accelerated Graphics port)

An AGP slot is used to support a graphics card, while the PCI slots are used to support various other cards like radio cards, TV tuner cards and Sound Cards.

We might have onboard graphics but we use a graphics card because it allows for better graphics on computers whose onboard might not have enough power to perform some tasks such as 3D rendering or image editing.