Switching the emphasis to graphics, a 1600 MHz engine clock managed respectable frame rates at 1080p in some mainstream titles like Call of Duty, League of Legends, and Portal 2.
This sentence is vague to me. What GPU was it exactly, and why use those games? I don't think I've ever heard any of those games to be particularly graphics intensive that "respectable frame rates" on 1080p is hard to achieve with them. It's not that the author mentioned anything like that, but you'd expect some new and exciting feat to be mentioned.