PS4 Pro 4.50 Boost Mode Feature

[CleanSlate]

 

In short, boost mode will work best in stabilising performance closer to target frame-rates and should prove interesting on unlocked titles, but you can't expect game-changing miracles. Games like Destiny that stick doggedly to their 30fps cap will see no improvement, and titles certainly won't break their performance limits and suddenly run at 60fps. However, there are plenty of games out there that glitch badly or run nowhere near their theoretical limits. In this scenario, boost mode could be revelatory.

 

Source: http://www.eurogamer.net/articles/digitalfoundry-2016-ps4-pro-boost-mode-tested-a-game-changer-for-unpatched-titles