Tom's Hardware Guide published a review on Undervolting AMD's Radeon R9 Fury For Better Efficiency
A quote from the article:
AMD's Radeon R9 Fury has been called everything from a hot plate to a space heater. This doesn't have to be the case, though. We massively improved the card's efficiency by undervolting it.Undervolting AMD's Radeon R9 Fury For Better Efficiency @ Toms Hardware
