Different Kinds Of Expansion Slots

  1. Most modern ATX Motherboards have a maximum of seven PCI or PCI-Express expansion slots, while microATX boards only have a maximum of four. Micro-ATX Motherboard has many advantages over ATX Motherboard, and they are given below. It is compact and smaller than ATX Motherboard, which sports more ports and slots than ATX.
  2. They’re different standards, different slots, and different expansion card types. AGP: The Accelerated Graphics Port slot was designed specifically to handle high-end graphics adapters. It may still be found on older PCs, but today’s systems use PCI-Express expansion slots to handle high-end graphics adapters.
  1. Different Types Of Expansion Slots
  2. List Three Different Types Of Expansion Slots

When purchasing a new Server, Workstation or PC to support an expansion card one of the most important things to determine is what type of slot does the motherboard have. There are 3 types of slots that have been used for over the years: ISA, PCI, and PCI Express (PCIe). These are also the most common types of slots that computer motherboards have had for expansion cards. Let’s take a look at each of these:

An expansion slot is a laser-cut slot on the blade plate designed to disperse heat and prevent blade deformation caused by overheating. The process of cutting, even under ideal circumstances, involves a lot of friction. ISA: The most ancient type of expansion slot is the ISA, which stands for (get this) Industry Standard Architecture. That’s because it never really had a name until another, better type of expansion slot came along. ISA slots hang around to be compatible with older expansion cards.

ISA Slots

The ISA Slots are shown in Green in image to the right. This is the oldest slot type that is still available today. Computers with ISA slots are no longer available from major computer manufacturers, Ram PC Systems still sells industrial class systems with ISA slots.

PCI Slots

Different Types Of Expansion Slots

PCI slots were the replacment for ISA slots. The PCI Slots are shown in the Red box in the image. PCI slots come in several different versions including 5 volt and 3.3 volt slots, and 32-bit and 64-bit PCI-X slots. PCI slots are going away as well but are still available from some major computer manufacturers but they usually only offer one PCI slot. Ram PC Systems has several different systems available with 2 or more PCI slots.

PCI Express Slots


PCI Express slots are the replacement for PCI slots, and also AGP (used only for video cards). PCI Express, also labeled as PCIe come in numerous bus widths labeled: x1, x2, x4, x8, and x16.

List Three Different Types Of Expansion Slots

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