Wow runs on 60 fps on my computer, and thats awesome. But sometimes it dips down to around 15 fps and stays that way for about 30 mins before going up again. This is not lag related, my ms doesnt change at all. I've played wow for 1 and a half year on this computer without having these problems before.
The only recent change ive done to my computer is installing new grafics drivers.
If you have any idea what could cause this, please post