下面是一些要考的重点:
- 5Gbps：USB 3.2 Gen 1×1=USB 3.2 Gen 1=USB 3.1Gen 1=USB 3.0，USB 3.2 Gen 1
- 10Gbps：USB 3.2 Gen 2×1=USB 3.2 Gen 2=USB 3.1 Gen 2=USB 3.1，USB 3.2 Gen 1×2
- 20Gbps：USB 3.2 Gen 2×2
- 40Gbps：Thunderbolt 3，Thunderbolt 4，USB4
We now find ourselves in a similar spot with USB 3.2. The newest, fastest version of USB 3.2 offers a max speed of 20Gbps and is called USB 3.2 Gen 2×2. (The 2×2 means it’s the second generation and has two 10Gbps lanes to achieve its maximum throughput of 20Gbps.) The older USB 3.1 has a single 10Gbps channel and is called USB 3.2 Gen 2. Then there’s USB 3.0, which is now called USB 3.2 Gen 1.
All USB 3.2 Gen 2×2 products use the Type-C connector, but not all USB-C ports are USB 3.2 Gen 2×2. A USB-C port can be either 20Gbps USB 3.2 Gen 2×2 or 10Gbps USB 3.2 Gen 2. A USB Type-A port can be 10Gbps USB 3.2 Gen 2, 5Gbps 3.2 Gen 1 or even USB 2.0. USB 4 will clear up this confusion next year, but until then you’ll need to read the fine print on products to ensure you’re getting the expected USB 3.2 connection between your devices.
一些链接：
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