types of pci slots on motherboard
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Users can select between different 4 pci slot motherboard types because each version provides unique features and functionality according to user needs and available space.
Cổng đồ họa tăng tốc - Wikipedia
AGP expansion slots are located near the processor on the computer’s motherboard, much like PCI slots. Their form factor, too, resembles that of their PCI counterparts.
PCI Express
Therefore, the mainstream PCI-E slots on the motherboard are basically concentrated on the four types: PCI-E x1 / x4 / x8 / x16.