Overclocking
Pushing the card further is tricky. There's not a great deal of scope on either the core or memory. After engaging in trial and error a few times we settled on the GPUs running at a maximum 1,066MHz (five per cent increase) and memory at an effective 5,200MHz. Going much higher on either caused visual corruption.
You ain't gonna get much more out of it, frankly.
We also ran Crysis 3 and Far Cry 3 with the elevated clocks; average framerate increase was 3.4 per cent at 4K.