Does this happen during fights (raids) or even when idling? Did you
try resetting the graphics options to their default values? What
happens when you start the game in OpenGL mode? Is your card running
at max speed? Powermizer feature may fail to "recognize" WoW as
"worthy" of speeding up
It happens at all times. Even when sitting alone in the middle of nowhere. Each time I tried a different driver the graphics options were reset to the default values. The settings are for it running in OpenGL, if that is what you mean. It was initially opening in DirextX mode, but that was causing an immediate crash. The Config.wtf was changed to OpenGL to get that issue resolved.
Powermizer has been set to max at all times and that made no difference either. I have also disabled Sync to VBlank since I know that can at times limit fps. That worked great for the fps in glxspheres and gears, but made no difference in WoW.
At the lowest settings it is playable with good fps, even in raids, BG's and arena's, but increasing any setting instantly kills the fps to 10.