Initial report says that devs will try to ramp up the FPS just in time for its release on the Xbox One X and other Xbox One devices. But Creative Director of Bluehole, Brendan Greene (PlayerUnknown) clarifies that it will run at 30 FPS.
Greene, also added that they are ‘constantly improving’ the before its scheduled launch on Xbox One console. To acheive the targetted 60 FPS, they allow the developer the opportunity to improve the game in a test environment through Game Preview program in which the Creative Director has his hopes high to attain the 60 FPS on both the standard Xbox One and the Xbox One X.
It was confirmed by PlayerUnkown in one of interviews few months back that PUBG will run on a solid 60 FPS on when it finally released for the Xbox One in December. standard Xbox One which has less power compared to its big brother, FPS could be halved.