The feature uses the extra grunt of the Pro model to deliver smoother performance in vanilla PS4 games (that aren’t patched for the Pro). So which games benefit most?
Eurogamer has done a preliminary round of testing, putting the likes of Project CARS, F1 2016, Knack and Assassin’s Creed Unity to the test.
It found that Project CARS saw the biggest framerate improvement, “in the region of 35-38 percent”. In other words, a full race at Le Mans with 44 cars in the base mode averages 37 frames per second, while boost mode sees the average leap to 51fps.
Other racing games saw big improvements as well, such as Assetto Corsa and F1 2016. The former test, using the Barcelona circuit, saw performance locked at 60fps, from an average of 52. F1 2016 enjoyed framerate boosts of between seven and eight frames, while also featuring less screen tearing.
Eurogamer has put Boost Mode on the PS4 Pro to the test, finding that racing games enjoyed the biggest gains
As for other games? Eurogamer found that Assassin’s Creed Unity enjoyed a 31% boost to performance when running in Boost Mode, constantly hitting 30fps instead of the low 20s.
Knack was also tested, in the form of an unpatched version on base PS4 hardware, an unpatched version on Pro hardware running boost mode and the full patched version meant for PS4 Pro. The result? Well, boost mode yields a 14% improvement over the base PS4, but still falls short of the patched version for PS4 Pro.
This 14% improvement also turned up when comparing Killzone Shadowfall.
The publication speculates that the Boost Mode takes advantage of the PS4 Pro’s higher CPU clock speeds and memory bandwidth. In the GPU department, it’s suggested that Boost Mode cranks up the clock speed here, but doesn’t take advantage of the 18 extra compute units in the GPU.
Check out the full PS4 Pro Boost Mode rundown at Eurogamer.