I have the exact same card with the exact same issue. We probably have the same Asus laptops as well. This issue started for me 3 days ago when they patched the game. I had a similar problem about a month ago that was cleared up by deleting the local.dat file in the Users/My Documents/GW2 folder and using run and typing:
“C:\Guild Wars 2\Gw2.exe” -repair
but this has not resolved the issue this time. Maybe it’ll work for you. If not, the game is unplayable now so I guess we just gotta wait for a patch because it seems game related. This is the only game I ever have major issues with.