There are a few of ways to look up your GPU's SN without physically inspecting the graphics card, just in case.

But unlike other apps, the Command Prompt isn't always easy to find. Here's how to open Command Prompt on your PC, no matter which version of Windows 10 you have.

Right-click on the Windows 10 Start button. From the pop-up menu, click on the command for Command Prompt. At the prompt, type the command "help," which displays a list of all available commands.