With the advent of Windows Vista
, Microsoft praised the boost in energy consumption efficiency in comparison with Windows XP. Still, there are exceptions to every rule. And while Vista indeed uses less energy over XP, users of the operating system can still experience excessive power use. One such example involves Vista SP2 and earlier during sleep or hibernation, and the HD audio controller, the Redmond-based company explained. The software giant has noted that there are two scenarios in which Vista SP2 sucks more power than it should.