AMD's position in the graphics market continues to be a tricky one. Although the company has important design wins in the console space—both the PlayStation 4 and Xbox One are built around AMD CPUs with integrated AMD GPUs—its position in the PC space is a little more precarious. Nvidia currently has the outright performance lead, and perhaps more problematically, many games are to a greater or lesser extent optimized for Nvidia GPUs. One of the chief culprits here is Nvidia's GameWorks software, a proprietary library of useful tools for game development—things like realistic hair and shadows, and physics processing for destructible environments—that is optimized for Nvidia's cards. When GameWorks games are played on AMD systems, they can often do so with reduced performance or graphical quality.