That's a typo
Look on newegg you will see the 1708 is the core number not the memory number.
Look the asus strix is a good card.
But it is costly.
I am getting Msi aero's as low as 590 usd so why pay over 779 plus tax at newegg or Amazon.
Cheapest MSI is $699 not sure where you get yours from, i think i will go with 2x EVGA FE , $1400 no taxes is a good deal.