USB Alternative
VGA
VGA is a legacy analog display connection used on older computers, monitors, projectors, KVM systems, and installed AV equipment that still requires analog video.
Overview · Comparison to USB · Use cases · Articles
Related: DVI · HDMI · DisplayPort
VGA overview
Review VGA as a legacy analog display connection, including its DE-15 connector, video-only role, common devices, adapter requirements, and current replacement by digital interfaces.
| Primary purpose | Analog computer video |
|---|---|
| Common connector | 15-pin DE-15 |
| Signal type | Analog video |
| General peripheral data | No |
| Audio support | No |
| Typical devices | Older monitors, projectors, computers, KVM systems, and installed AV equipment |
| Current status | Legacy display interface largely replaced by digital standards |
Sources: VESA About DisplayPort and VESA DisplayPort technology update.
VGA comparison to USB
Compare VGA with USB for analog display output, general data, audio, adapters, and the practical differences between a legacy video connector and modern multi-purpose USB connections.
| Factor | VGA | USB |
|---|---|---|
| Primary role | Analog display output | General-purpose data, peripherals, charging, and supported display transport |
| Video signal | Analog | Display output depends on supported USB graphics, USB-C display modes, or docks |
| Audio | No | USB supports digital audio devices and display paths that may include audio |
| General peripheral data | No | Core USB function |
| Adapters | Modern digital sources generally require active conversion for VGA output | USB to VGA adapters and docks can provide VGA through conversion hardware |
| Best fit | Keeping older monitors, projectors, or installed AV systems working | Modern peripherals and systems without native VGA |
Sources: VESA DisplayPort over USB-C and USB-IF USB4.
VGA use cases
See where VGA still matters for older projectors, monitors, KVMs, and installed systems, and when a digital display connection is the better modern option.
| Use case | Why VGA fits | Better modern option |
|---|---|---|
| Legacy projector | Older presentation equipment may expose VGA as its most compatible input | HDMI or DisplayPort on newer projectors |
| Older monitor | The display may only provide analog VGA input | Keep VGA for that monitor; replace with a digital display during normal upgrade |
| Installed KVM or AV system | Existing infrastructure may be built around VGA cabling and switching | Digital KVM, HDMI, or DisplayPort when the system is refreshed |
| USB-C laptop to legacy display | VGA can still be reached through an active converter | USB-C to HDMI or DisplayPort when the display supports digital input |
| New display setup | Little reason to choose VGA for new equipment | DisplayPort, HDMI, or USB-C display connectivity |
Sources: VESA About DisplayPort.
VGA articles
Browse guides to USB and VGA adapters, legacy monitor connections, display compatibility, and practical video conversion questions.
