Hello, first of all i’m terribly sorry if this is old news!
My Laptop performed very poorly given its specs (http://www.samsung.com/hk_en/consumer/computer-peripherals/notebook/series-7/NP700Z5C-S01HK).
I had around 50-60 FPS on all low settings, 20-40 on medium and couldnt find any drivers or anything.
Then i read about Nvidia Optimus, a program that changes between a light and a heavy GPU, depending on the situations needs (Nvidia Optimus wikipedia: http://en.wikipedia.org/wiki/Nvidia_Optimus).
Unfortunately this program don’t work very well with GW2 and my laptop. What i had to do was to get into the program, and add GW2 to the list of programs to be run with the 640M-card (tutorial: http://www.youtube.com/watch?v=Zh4HCadTY_A). Now i’m able to play medium-graphics with 50-90 FPS instead of 20-40!
I’m hoping for even more optimization for my card in the future, but this surely made things better, at least for me!
I’m not very good with this techy stuff so excuse me if i got words wrong and stuff like that!
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