AMD and EA aren't able to keep their promises regarding the Mantle patch for Battlefield 4. Originally expected to be launched in late December, word now hits the wire that the patch won't arrive until sometime in January.
“After much consideration, the decision was made to delay the Mantle patch for Battlefield 4. AMD continues to support DICE on the public introduction of Mantle, and we are tremendously excited about the coming release for Battlefield 4! We are now targeting a January release and will have more information to share in the New Year.“ – AMD PR