According to Eurogamer, the Xbox One will keep around 10% of its GPU for Kinect and apps, which was confirmed by Microsoft technical fellow Andrew Goossen.
“Xbox One has a conservative 10 per cent time-sliced reservation on the GPU for system processing. This is used both for the GPGPU processing for Kinect and for the rendering of concurrent system content such as snap mode.”
Interestingly, Microsoft intends to open this up for developers, so they can use the full force of the Xbox One GPU claiming:
“The current reservation provides strong isolation between the title and the system and simplifies game development – strong isolation means that the system workloads, which are variable, won’t perturb the performance of the game rendering. In the future, we plan to open up more options to developers to access this GPU reservation time while maintaining full system functionality.”
Will this affect how the Kinect works with the Xbox One if devs do tap that unused GPU power? We’re not sure for now, but I’m confident they’ll pull it off. Having played the Xbox One, I can say that the games are really good, even with 10% GPU in reserve – although I don’t know how many were just simulated on the PC.