I didn't, it's just the way the clocks are written. My clocks are what I set but if you add boost to them they go a lot higher.
You also need to change whyscotty's mem speed to 1502 as I think he was just running the stock clocks. Expect a big score from whyscotty anytime soon, well when he has paid the elec bill anyway.
Here is what my cards were doing behind the scenes, I just re ran the bench using the same GPU settings but with the CPU @5.0 (I wanted to make sure I finished the bench).
If you check out the GPU load, it is all over the place where the cards are bottlenecking even @1600p. This is something we are going to see more and more of as people buy R9 290 and 290Xs and use them in multi GPU setups.