Guild Wars 2

Hi there,

I noticed a very strange thing, my computer does meet the requirements, and i believe it should be able to crunch out all the rendering.

The graphics were all on high when i was playing smoothly on the outskirts of the Black Citadel, but then, when i entered the Citadel. At times, my Fps takes a plunge!

I put the graphics on Best performance, But then, Put every Options Back to High, and the issue seems to be gone?!
Black magic and Sorcery ?

If i put the graphics back on high, im supposed to be getting that immense lag, but im not!?

Can anyone care to explain ?
I think it could be the shaders, something to do with that Useless Smoke or Cloud Behind the Black citadel, where you have the view of the plains and cliffs all the way down.
It could be whats causing my Gpu to slow down, since it has to crunch out the rendering.
Summary:
Entered Black Citadel, FPS hit rock bottom, Put graphics on low, then put them back on high, everything is fixed, Sorcery achieved!