Its upto you but i also have a thread on here as i was in the very same boat and made my mind up fiannly about 5min ago lol. If it helps you in any way im going with the 770 simple reason http://www.overclockers.co.uk/showproduct.php?prodid=GX-219-EA&tool=3 read the first review, after all is said and done and we've all looked at benchmarks when somone says what he is saying it all becomes clear (to me at least)