Microsoft is throwing a bone to PC game developers with the release of PIX for Windows 10. Previously only available as a Xbox development tool, PIX allows developers to jump in to monitor and tune a game's performance for easier optimization.
PIX essentially uses the DirectX 12 API to give developers a clear look at every step of the rendering process. This allows the program to give a clear look at how the game is being rendered in detail, even down to individual frames. PIX also makes it easier to spot issues with corrupted data or synchronization.
PIX is available in beta for Windows 10 now for free, and it can be downloaded direct from Microsoft. Meanwhile, Microsoft has also provided a handy set of videos to help developers get started with PIX.