also here is some GPU info that came out today:
https://www.guildwars2.com/en/news/bill-freist-talks-optimization-and-performance/
These people had processors that are much more powerful but results should still correlate
EDIT:: in case it isn't obvious, your GPU (7700 series) is an improvement to the 6700 series. You can peg your results to that bar. Looks like you have one of the better compatible cards. (one of the few series working really well is the 7xxx-series) congrats!
ALSO:: same link as Tab54o
he posted his while I was writing my first post.