Just joined nostalrius last week and i haven't been able to play. If i stay still, walk or cast spells i have 60 fps but when i rotate my camera the game drop the fps by alot that the game freezes for a while like 2 / 3 seconds.
What are your system specs? Also, FPS drop is a natural occurrence, if for example, you are panning from a sparsely populated area to an intensely populated area or an area where many spell effects, or, a lot particle clutter is happening.
Im at the tauren starting zone like the image bellow. http://i.imgur.com/gqkuVua.jpg I tryed lowering the graphics to the lowest but problem continues.
I have the same issues (and same graphic card). I tried to put everything on low, removed every addons but fps keeps dropping each time I rotate the camera to a point where it freezes... I also tried running the game in compatibility mode but it didn't change anything. I suspect a problem with the client (which is 10 years old) and my Graphic card...