Plenty of third-party options already exist for doing so, but Microsoft is making it even easier for enthusiasts to check their GPU’s temperature with an improved version of Task Manager. The feature is live on the latest Insider Preview Build (18963), which provides a taste of what’s coming to Windows 10’s next major feature update (20H1).
Other additions include the ability to rename virtual desktops, server-side improvements to Microsoft Search, quicker account picture updates, and more control over optional features. Mouse cursor speed has also been added to the modern settings menu, while Notepad has been shifted to the Windows Store for speedier updates.
Unfortunately, Task Manager doesn’t seem to support your CPU temperature yet, but it’s likely that will be added down the road. You’ll need a graphics driver that supports version 2.4 (or higher) of WDDM. Unfortunately, temperatures are provided only in Celsius for now.