USB-C: Hướng Dẫn Toàn Diện Về Đầu Nối Đa Năng

## Why USB-C Is Everywhere

USB-C is the first connector that can handle **everything**: data, video, audio, and power through a single, small, reversible plug. But not all USB-C cables and ports are equal.

## What USB-C Can Do

| Feature | Requires |
|---|---|
| Charging (up to 240W) | USB PD 3.1 |
| 10 Gbps data | USB 3.2 Gen 2 |
| 40-80 Gbps data | USB4 / Thunderbolt |
| Video output | DP Alt Mode or Thunderbolt |
| Audio output | USB Audio Class |

## The Cable Problem

A USB-C cable might only support USB 2.0 (480 Mbps) even though it looks identical to a 40 Gbps Thunderbolt 4 cable. **Always check the cable's rated speed**, not just the connector.

## How to Identify Your USB-C Port

Look for these icons near the port:
- ⚡ Lightning bolt = Thunderbolt
- SS or SS10 = SuperSpeed USB 3.x
- 🔋 Battery icon = Power Delivery charging
- DP = DisplayPort Alt Mode

## Buying Tips

1. For charging: any USB-C cable with PD rating ≥ your charger's wattage
2. For data: look for 'USB 3.2 Gen 2' or 'USB4' on packaging
3. For displays: need 'DP Alt Mode', 'Thunderbolt', or 'USB4' cable
4. For docking: Thunderbolt 4 cable is the safest all-in-one choice