Hey there! Let's tackle your questions about that Lenovo USB-C PD port step by step.

关于USB-PD端口的额定功率 #

First off, a quick clarification: USB PD (Power Delivery) is a separate power specification from USB 3.x speed ratings (like 3.2 Gen 2). While USB PD 3.1 does support up to 240W, that's the maximum spec—not every port will hit that, especially on consumer laptops.

For Lenovo laptops, USB-PD port power ratings vary by model:

• Most mainstream models have PD ports rated for 65W or 90W (enough to charge the laptop itself and power small peripherals)
• Higher-end workstations or gaming models might go up to 135W or more
• If the port is only meant for charging peripherals (not the laptop), it might be limited to lower wattages like 15W or 27W

The most reliable way to get the exact rating is to check your laptop's official user manual or Lenovo's product page for your specific model—they’ll list port specs clearly.

软件工具扫描USB端口规格 #

If you want to dig into the specs via software, here are a few great options:

• USBView: This is a free, official tool from Microsoft. It’ll show you super detailed info for every USB port, including PD power capabilities, USB speed generation (like 3.2 Gen 2), and connected device details. Just run it, find your USB-C PD port in the list, and expand it to see all the technical specs.
• HWiNFO: A popular all-in-one hardware monitoring tool. It not only tracks your CPU/GPU but also lists every USB port’s protocol support, PD power ranges, and speed ratings. Look under the "USB Devices" section for your port’s details—it’s pretty intuitive to navigate.
• Device Manager (your existing screenshot): You can get some info here too. Expand the "Universal Serial Bus controllers" section, right-click your USB-C port, go to Properties > Details, then select a property like "Hardware Ids" or "Device Instance Path". Look up the chip model from that string, and you’ll find its supported PD specs (though this is a bit more hands-on than the other tools).

备注：内容来源于stack exchange，提问作者SpaceFlier