Spec calls for more-efficient PC power supplies

April 15, 2004
In a move to reduce computer power consumption, Intel,Santa Clara, Calif. announced a new set of guidelines for power-supply manufacturers.

In a move to reduce computer power consumption, Intel, Santa Clara, Calif. (www.intel.com), announced a new set of guidelines for power-supply manufacturers. The guidelines, Version 2.0 of Intel's ATX12V Power Supply Design Guide, spell out physical form factor, cooling requirements, connector configuration, and electrical and signal-timing information.

The main portion of the spec calls for a minimum measured efficiency of 70% at full (100%) or typical (around 50%) load and 60% efficiency at light (20%) load. The guidelines recognize that PCs waste a lot of power when performing less demanding tasks. For instance, there is no need for the power supply to generate maximum power for such light tasks as sending e-mail or creating documents. Tests by Intel researchers showed that some power supplies are less than 50% efficient when not being fully used. The inefficiency shows up as heat, which must be removed from enclosures by fans.

The increase in efficiency is projected to cut power wastage for an average PC by about 25% or 50 W. A typical desktop PC and CRT monitor consume upwards of 200 W. This translates into an estimated electrical savings of about $17/year for each PC.

Other changes include replacing the current 2 10 main power connector with a 2 12 connector to support the new 75-W PCI Express requirement.

Sponsored Recommendations

June 6, 2025
In the rapidly evolving landscape of industrial manufacturing, reliability, productivity, and worker safety take precedence. However, traditional connectivity approaches often...
June 6, 2025
Amidst the rapid evolution of electronics manufacturing, reliability, productivity, and worker safety remain paramount concerns. Yet, traditional connectivity methods often falter...
June 6, 2025
While many within the industrial manufacturing sector grasp the importance of smart manufacturing for optimizing processes, boosting productivity, and future-proofing operations...
June 6, 2025
For electronics manufacturers grappling with formidable challenges, navigating the path to success requires adapting to the dynamic landscape of the industry. How can electronics...

Voice your opinion!

To join the conversation, and become an exclusive member of Machine Design, create an account today!