The differences between **USB 2.0 Type-C** and **USB 3.1 Type-C** cables:
---
### **1. Data Transfer Speed**
- **USB 2.0 Type-C**
- Max Speed: **480 Mbps** (High-Speed mode).
- Suitable for low-speed devices (e.g., keyboards, mice).
- **USB 3.1 Type-C**
- **Gen1**: 5 Gbps (SuperSpeed USB 3.1 Gen1, same as USB 3.0).
- **Gen2**: 10 Gbps (SuperSpeed+ USB 3.1 Gen2).
- Ideal for high-speed storage (e.g., SSDs) and 4K video.
---
### **2. Pin Configuration & Internal Wiring**
- **USB 2.0 Type-C**
- Uses only **4 pins** (2 differential pairs) for data.
- Simpler wiring, lower cost.
- **USB 3.1 Type-C**
- Uses **additional 8 pins** (12 active pins in total).
- Supports full-duplex communication with separate TX/RX lanes.
- Requires shielded cables to reduce interference.
---
### **3. Power Delivery (PD) Capability**
- **USB 2.0 Type-C**
- Default: **5V/0.5A (2.5W)**.
- Max: **5V/3A (15W)** (if USB BC 1.2 supported).
- Usually lacks USB PD support.
- **USB 3.1 Type-C**
- Supports **USB PD**, delivering up to **100W (20V/5A)**.
- Common profiles: 5V/3A, 9V/3A, 15V/3A, 20V/5A.
> **Note**: Actual power delivery depends on cable and device compatibility.
---
### **4. Video Output (Alt Mode)**
- **USB 2.0 Type-C**
- **No DisplayPort/HDMI Alt Mode** support.
- **USB 3.1 Type-C**
- Supports **DisplayPort Alt Mode** (4K@60Hz possible).
---
### **5. Physical Markings & Compatibility**
- **USB 2.0 Type-C**
- Often labeled **"USB 2.0"** or **"480 Mbps"**.
- **USB 3.1 Type-C**
- Marked with **"SuperSpeed"**, **"10Gbps"**, or **"SS"** (SuperSpeed).
- More internal contacts (visible metal pins).
---
### **6. Typical Use Cases**
- **USB 2.0 Type-C**: Charging, low-speed peripherals, legacy devices.
- **USB 3.1 Type-C**: Fast data transfer, docking stations, high-wattage charging.
---
### **Comparison Table**
| **Feature** | **USB 2.0 Type-C** | **USB 3.1 Type-C** |
|------------------------|--------------------------|----------------------------------|
| **Speed** | 480 Mbps | 5 Gbps (Gen1) / 10 Gbps (Gen2) |
| **Pins Used** | 4 pins | 12 pins (full-duplex) |
| **Max Power** | 15W | 100W (with PD) |
| **Video Support** | No | Yes (DisplayPort Alt Mode) |
| **Best For** | Keyboards, basic charging | SSDs, 4K video, fast charging |
---
### **Key Notes**
1. **Physical Compatibility**: Both cables fit the same port, but performance caps at the lower standard.
2. **Certifications**: Check labels for **USB 3.1 Gen2/PD/EMARK** chips if high performance is needed.
3. **Thunderbolt 3/4**: Different from USB 3.1 (supports 40 Gbps).
For high-speed data or video, always choose **USB 3.1 Gen2** (or newer) Type-C cables.