To see the motherboard on a PC, the easiest way is to use the built-in System Information tool in Windows. Here's how:

1. Press the Windows key + R to open the Run dialog.
2. Type "msinfo32" and press Enter.
3. In the System Information window, look for "BaseBoard Manufacturer," "BaseBoard Product," and "BaseBoard Version" in the System Summary section. These show the motherboard manufacturer, model, and version.

Alternatively, you can use the Command Prompt:

• Open Command Prompt.
• Type the command: wmic baseboard get product,Manufacturer and press Enter.
  This will display the motherboard manufacturer and model.

You can also use third-party software like CPU-Z or Speccy to get detailed information about your motherboard. If you want to physically check, you would need to open the PC case and look for the model printed on the motherboard itself. These methods work on most Windows PCs and give a quick way to identify your motherboard without opening your computer case.