The boost clock shown for the product is fairly pointless, I think it's just the AIB's way of saying this card will boost to at least that amount.
Nvidia GPU boost is used on all cards and and it decide what clock to run based on temperate and power.
How did you get a Zotac card so fast?
Cheers, will see how I go.
I ordered one from a competitor, got lucky as 300 people were viewing it on checkout.