The latest Steam client beta introduces a feature that users had long been asking for: a counter for frame-rate. From now no longer necessary to use external tools like FPS to display the frame rate at which our games are running because the Steam client itself will be able to.
Currently it is not possible to customize the look, color and position of the counter, but it is expected that in future updates will add options for this. Along the expected counter FPS, the new Steam beta introduces a handful of enhancements that particularly affect the system relay game. The most notable new feature this system now automatically adjust the video bitrate according to the bandwidth available on the connection.
Check out the rest of the fixes and tweaks added with the new update:
- Reduced CPU usage when drawing animated images or videos
- Fixed video playback performance regression on Mac OS X and Linux
- Added FPS counter to Steam Overlay
- Fixed reloading settings values in the Steam Overlay
- Improved capture performance in D3D9 games
- Improved audio/video synchronization
- Improved automatically adjusting video encoding bit rate when a change in available upload bandwidth is detected
- Fixed opening the broadcast watch page from client UI (friends list, invite chat message, etc.) in the Steam Overlay
- Improved capture performance in OpenGL games when hardware support is enabled on machines with newer Nvidia GPUs
- Added first time use and other UI to Big Picture mode
- Fixed first friend invite to a broadcast sometimes getting dropped
Source: [Steam Community]