The Tech Report published a review on the A quick look at Mantle on AMD's Kaveri APU
A quote from the article:
Three months ago, AMD foretold of the performance improvements that Mantle, its close-to-the-metal graphics programming interface, would bring to Kaveri in Battlefield 4. We've now put those predictions to the test by comparing Mantle and Direct3D performance on AMD's A8-7600 APU.A quick look at Mantle on AMD's Kaveri APU @ The Tech Report