pci bus slot on motherboard
4 PCI Slot Mid-tower 4th Gen Intel Core Supports Windows 7
Slot Size PCI-E and PCI-X standards differ greatly when it involves the dimensions of the slot on the computer’s motherboard.
What is PCI Express? Do PCIe lanes, slots, and versions matter?
Your graphics card’s PCI slot configurations should match these numbers to be securely placed on your motherboard.
What is AGP? The Differences Between 1x, 2x, 4x and 8x Explained ...
Although the bus speed is slightly slower than PCI Express, the PCI slots are the most common type of slot and found on most motherboards today.