Cable Types and ports

PS/2 Combo Port (Round, half purple/half green)

Used for legacy keyboards and mice; uses a 6-pin mini-DIN connector.

Standard USB Type-A Port (Black rectangular port)

Typically USB 2.0; connects standard peripherals like mice and keyboards.

High-Speed USB Type-A Port (Red or blue rectangular port)

Coloring denotes high-speed USB 3.0+ (SuperSpeed) or sleep-and-charge capabilities.

S/PDIF / Optical Audio (Square port with a small flap)

Also known as TOSLINK; used for high-quality digital audio transmission over fiber optic cable.

HDMI (Notched rectangular video port)

High-Definition Multimedia Interface; transmits digital video and audio to modern monitors and TVs.

VGA (Blue, 15-pin D-sub video port)

Video Graphics Array; transmits analog video only and is commonly found on older monitors.

DVI (White, wide rectangular video port)

Digital Visual Interface; can transmit digital and/or analog video depending on the specific pin layout.

FireWire 400 / IEEE 1394 (D-shaped port)

Legacy high-speed data connector, often used for older digital video cameras and Apple devices.

eSATA (Straight rectangular port with an L-shaped tab inside)

External SATA; used for connecting external hard drives at native SATA speeds.

RJ-45 Network Port (Square port with 8 metal contacts, often with LEDs)

Used for wired Ethernet/LAN connections.

1/8-inch (3.5mm) Analog Audio Jacks (Cluster of colored circular jacks)

Used for surround sound, microphones, and line-in audio; green is typically standard stereo out.

VGA (Video Graphics Array)

An older, analog-only video connector. It is typically blue and features 15 pins arranged in three rows of five (officially called a DE-15 connector). Because the signal is analog, video quality drops significantly over long cables.

DVI-A (Digital Visual Interface - Analog)

Transmits ONLY analog signals. It was used as a bridge to connect older tube monitors to modern graphics cards, but is very rarely used today.

DVI-D (Digital Visual Interface - Digital)

Transmits ONLY digital signals. You can visually identify it because the flat horizontal pin on the side stands alone, with no small square pins surrounding it.

DVI-I (Digital Visual Interface - Integrated)

Transmits BOTH analog and digital signals. You can visually identify it because the flat horizontal pin on the side is surrounded by four small square pins (these four pins carry the analog signal).

DVI Single-Link

Supports standard screen resolutions (up to 1920x1200). You can identify a Single-Link DVI cable because there is a distinct visual gap of missing pins right in the middle of the main pin cluster.

DVI Dual-Link

Supports much higher screen resolutions and refresh rates by doubling the transmission power. You can identify a Dual-Link DVI cable because the main pin cluster is completely filled in with a solid block of pins.

HDMI (High-Definition Multimedia Interface)

The standard for home entertainment. A single cable transmits both high-definition digital video and digital audio at the same time. The connector has a distinct notch on both bottom corners.

DisplayPort

Primarily used for high-end computer monitors and PC gaming. It transmits high-bandwidth digital video and audio, and supports daisy-chaining (connecting multiple monitors together in a line). The connector looks like a USB rectangle with only one corner cut off.

Standard DisplayPort

The full-sized video connector easily identified by its asymmetrical shape (a rectangle with only one corner cut off). It has 20 pins and often includes a physical locking mechanism that requires you to press a button to unplug it.

Mini DisplayPort (mDP)

A shrunken version of the DisplayPort connector originally developed by Apple. It is a small, roughly square connector with two chamfered (angled) bottom corners. It is physically identical in shape to legacy Thunderbolt 1 and Thunderbolt 2 ports.

DisplayPort over USB-C (Alt Mode)

Allows a modern, reversible USB Type-C port and cable to transmit native DisplayPort video signals. This is heavily used on modern laptops to connect to external monitors or docking stations.

Multi-Stream Transport (MST)

A specific DisplayPort feature that allows you to "daisy-chain" multiple monitors together. Instead of running three separate cables from the PC to three monitors, you run one cable to the first monitor, a second cable from monitor 1 to monitor 2, and so on.

Standard HDMI (Type A)

The standard 19-pin connector used for most desktop monitors, TVs, and gaming consoles. It is easily identifiable by its distinct D-shape with notches on both bottom corners.

Mini HDMI (Type C)

A shrunken version of the standard connector, often used on DSLR cameras, camcorders, and portable monitors. It maintains the same 19-pin layout and general shape but is significantly flatter.

Micro HDMI (Type D)

The smallest HDMI connector, roughly the same size as a Micro-USB plug. It is used on compact, highly portable devices like action cameras (e.g., GoPro) and ultra-thin laptops.

HDMI Audio & Video Integration

A primary feature of HDMI is that a single cable transmits both uncompressed high-definition digital video and high-quality digital audio simultaneously, eliminating the need for separate audio cables.

HDMI Versions (1.4, 2.0, 2.1)

While the physical connector looks exactly the same across versions, newer cables and ports support much higher bandwidth. For example, older versions support 1080p, while HDMI 2.1 supports 4K at 120Hz and 8K at 60Hz.