UPDATE: A Sony representative has confirmed Boost Mode with Polygon and officially describes the feature as such:
Boost Mode lets PS4 Pro run at a higher GPU and CPU clock speed for smoother gameplay on some PS4 games that were released before the launch of PS4 Pro (and has not been updated to support PS4 Pro).
Games that have a variable frame rate may benefit from a higher frame rate, and load times may be shorter in some games too.
ORIGINAL STORY: Sony detailed a number of new features available with the PlayStation 4 system software update 4.50 earlier today, though there’s one particular addition that may have got lost amidst all the chatter of external storage support and custom wallpapers.
According to Japanese gamers (via NeoGAF) who got access to closed beta for PS4 update 4.50, the firmware will introduce something known as Boost Mode, which allows PlayStation 4 Pro owners to enjoy improved frame rate among other additions for games that have NOT yet received a PS4 Pro patch.
The translation for the feature reads as follows: “Boost mode. When playing games released before the release of PS4 Pro (CHU-7000 series), you may be able to enjoy high quality game play by improving frame rate etc etc. Please turn it off when unexpected action occurs during game play.”
PS4 system software 4.50 is currently in its beta phase, so those of you who were lucky enough to get picked for the testing period will be able to enjoy all of the new features from today.