How computer connectors and expansion paths carry display, network, storage, peripheral, and power signals.
A connector is useful only when it carries the signal the task requires and both connected devices support that capability. An adapter can change a physical connection; it cannot add a missing host feature.
| Need | Typical connection |
|---|---|
| Digital display | HDMI, DisplayPort, or a supported USB-C display path |
| Legacy display | VGA or DVI where the equipment requires it |
| Wired Ethernet | RJ45 copper Ethernet |
| Internal SATA drive | SATA data and SATA power |
| Internal graphics or expansion card | A compatible PCIe slot |
| External multifunction connection | USB-C or Thunderbolt only when the host and accessory support the needed functions |
USB-C is a connector, not a promise of Thunderbolt, Power Delivery, USB4, or video output. Confirm the computer, cable, and accessory specifications before selecting a dock or display adapter. The USB-IF Type-C guidance distinguishes these capabilities.
PCIe is an internal expansion bus for devices such as graphics cards and some storage controllers. USB, HDMI, and Ethernet are external connection families. Identify whether the task is adding an internal component or attaching an external device before choosing an adapter or port.