When the next BF4 patch will hit the changelist will be huge, CTE is miles above what the current BF4 is. Performance with Mantle in BF4 is great, with some minor stuttering from time to time but that seems to be a game issue, related to that file that some have mentioned. Besides the lock-up with ULPS on, I have found another issue: in Dungeon Siege 3 (Crossfire off via profile) there is intermittent frame corruption. Once every 5-10-15 minutes one frame is corrupt, it has some randomly colored tiled squares pattern all over the screen. This did not happen with the 14.200 drivers (Cat 14.8).