Reducing the WEI seems to be a common thing with this new release. Try what is posted above or rolling back your driver
Even better yet why not go back to one that worked best in the past?
I personally don't jump right into the latest release till I've seen some posts on how it is working out for others. Still don't understand why people are so eager to update their GPU driver every time a new one comes out.
I also like to recommend that people create a restore point before they download and install any new driver updates or programs, just in case they don't like them. It makes it much easier to uninstall the driver/app, then restore your system back to where you where before you made any changes.
If it ain't broke why fix it? At least until you know if their is any real world benefit to using it.
I also think that the newer drivers
are geared more toward getting the most out of the Fermia's than older cards, but that's just my opinion.