AMD OCAT is a free tool that allows you to measure performance in all Windows games, including the latest productions using DirectX 12 or Vulkan API. Although OCAT is owned by AMD, it can be used with any manufacturer's graphics card. The software itself allows you to measure not only the average frame rate, such as the classic Fraps, but also the rendering and display times.

Based on this, you can get a complete overview of the GPU performance. Of course, as befits this type of program, OCAT also has a screen overlay, which displays information about the number of frames generated in real time.