Most people know PCIe as the slot used to install their graphics card, and nothing more. It’s the long horizontal receptacle located beneath the CPU socket that has duplicates below it (similar-sized or smaller), which are mostly ignored. Among these “other” PCIe slots are a few PCIe x1 slots that might appear too small to be of any real use. However, these tiny slots are probably the ones that are the most versatile. On a modern motherboard, you may not feel the need to add any expansion card, but older motherboards can benefit from advanced NICs, extra USB and SATA ports, and discrete sound cards. If you’re an enthusiast, even your modern motherboard’s PCIe x1 slots can allow you to expand its capabilities, thereby avoiding investment in a new motherboard.