Help me choose: More efficient power supply
• Power supply units (PSU) are devices that power a computer. They convert AC power from utilities into DC power used in most electronics.
Achieve potentially significant annual energy savings, see the Dell Energy Calculator (http://content.dell.com/us/en/corp/d/corp-comm/earth-cio-corner-tools.aspx) for specific model calculations
Air conditioning costs will likely be lower as a result of the reduced heat load
Dell’s higher-efficiency PSUs meets the following specifications:
80 percent or greater efficiency at 20 percent, 50 percent and 100 percent of rated load, and True power factor of 0.9 or greater
Higher power factor reduces current draw by roughly 50 percent, which means that more computers can be placed on the same branch circuit without the need for costly electric infrastructure upgrades. In new construction situations, smaller and less expensive distribution systems can be constructed when computers using higher efficiency power supplies are considered in the planning process.
Finally, more efficient power supply options on Dell OptiPlex provide wide-ranging features:
Wide-ranging PSUs can operate at any input voltage between 90 VAC to 264 VAC