Barroso and other Google engineers believe that home computers can be made just as efficient as Google servers. Toward that end, Google, Intel, and other partners are proposing a new power supply standard. Assuming the new power supply design gets deployed across 100 million PCs running an average of eight hours a day, Google estimates a savings of 40 billion kilowatt-hours over three years, which translates to $5 billion at current California energy rates.
The problem with today's power supplies, according to the paper, is that they were designed to provide multiple output voltages. In 1981, chips needed this, but not today. Yet because power supply designs haven't changed, power supplies continue to be overprovisioned and inefficient.
Google servers, and the new PC standard Google is proposing, use a simplified 12V power supply that generates a single voltage. When certain motherboard components require something different, the power can be modulated using voltage regulator modules.
Google estimates 85% energy efficiency can be achieved at virtually no cost, while spending about $20 more for higher quality components can lead to over 90% efficiency.
IT's Reputation: What the Data SaysInformationWeek's IT Perception Survey seeks to quantify how IT thinks it's doing versus how the business really views IT's performance in delivering services - and, more important, powering innovation. Our results suggest IT leaders should worry less about whether they're getting enough resources and more about the relationships they have with business unit peers.
What The Business Really Thinks Of IT: 3 Hard TruthsThey say perception is reality. If so, many in-house IT departments have reason to worry. InformationWeek's IT Perception Survey seeks to quantify how IT thinks it's doing versus how the business views IT's performance in delivering services - and, more important, powering innovation. The news isn't great.