A study that was commissioned by AMD found that U.S. data centers spend enough electricity to power about 4 million homes which costs about $2.7 billion each year. As Web 2.0 boom have demanded more computing power, the demand of power from servers and cooling systems have gone up. The study estimates that U.S. servers use 1.2% of the entire U.S. power consumption. Many companies are encouraging power efficient processors and water cooling systems to save electricity.
