Today's Battlefield 4 update for Windows PC introduced the delayed Mantle patch, according to a Battlelog post by Frostbite technical director Johan Andersson.
"The biggest performance gains can be seen when the game is bottlenecked by the CPU which can be quite common even on high-end machines and this was main goal to improve on with Mantle," Andersson wrote. "We've also been able to streamline and optimize some of the GPU workload. The end result is that game performance is improved in virtually all scenarios in Battlefield 4 on both Windows 7 and Windows 8 when running with Mantle!"
Mantle is an API designed to improve a game's visuals and how efficiently it's rendered. Full instructions on how to enable Mantle, along with further information about expected performance improvements, are outlined on the blog post.
Originally expected in late December, Battlefield 4's Mantle patch was delayed until an unspecified date in January. At the time an AMD representative told Polygon that the cause of the delay was due to EA's decision to "halt game development in favor of bug stomping."