Extra PCI Express slots can be used for a variety of purposes, such as adding a second graphics card, adding another hard drive, or using them as extra ports on a motherboards. They can also be used to add additional USB 3.
0 ports or additional USB 2.0 ports.
One potential use for extra PCI Express slots is to add a second graphics card to a computer. This could allow users to game using two different sets of graphics cards or use one card for work and one card for gaming. Adding another hard drive to a computer can also be done using an extra slot on the motherboard. This can allow users to have more storage space without having to buy an additional hard drive or attach it externally.
Additionally, adding an extra port on a motherboard can be useful if there is already enough USB ports on the computer but someone wants to use one more device, such as a keyboard and mouse. Finally, extra PCI Express slots can also be used as extra ports on motherboards, allowing users to connect additional devices such as external drives or printers.