Update:
I assume from the above article I linked that they used a reference GTX980Ti for comparison.
That has a BOOST clock of 1075Mhz.
If they overclock the Kingpin to 1550MHz that's a 44% overclock... but as I said it doesn't scale that way so looking at several games I saw closer to 30% frame rate improvement.
*Then if you can easily overclock cheaper cards to 1400MHz which is a 30% boost that makes me question of pushing further to 44% would really make much difference to most games or if we're running into a CPU bottleneck? (of course it depends on the game and DX12 in the future will mitigate this).
Whatever... I'm seriously questioning if we'd see more than 5% gains over an overclocked, cheaper GTX 980Ti though.