Cooler Master are evidently so confident in the quality and lifespan of their "Real Power" power supplies that they've decided to up the warranty period to five years.
However keep in mind this only applies with the Real Power M and Pro series PSUs, not the vanilla Real Powers. The press release states otherwise but a correction was since made by Cooler Master themselves.
Grab the official PR here for more info.
Every computer system requires a reliable power supply. At Cooler Master, we pride ourselves on designing power supply units that meet the needs of even the most demanding applications. As part of our total commitment to quality, Cooler Master is pleased to announce that we will be extending the warranty period of our Real Power and Real Power M series power supply units to a period of five years. With this newly extended warranty, Cooler Master users can purchase Real Power and Real Power M PSUs with even greater confidence.