AMD's Kaveri is, in many respects, a huge step forward. The new APU's low-power performance is excellent, its integrated graphics torpedo anything Intel offers at an equivalent price point, and it includes support for features like Mantle, HSA, and TrueAudio. Yet, despite these lauded capabilities, there's a clear problem sitting in the middle of Kaveri like a turd in the proverbial punchbowl: Steamroller.