Battlefield 4 was the first game to support Mantle, and Legit Reviews found that with just a driver update and patch by EA-DICE, Mantle did provide a significant performance increase. Now, Square Enix has stepped up and patched Thief to support Mantle and AMD€™s TrueAudio. Recently, we tested the patch on an AMD A10-5800 APU and found that it provided a performance increase, which was dependent on the quality settings. Let’s take a look at how Mantle affects the performance of Thief on an Intel CPU.