Top 5 Energy-efficient Computers


Toshiba Portege R600

The Toshiba Portégé laptop line has earned Energy Star 4.0 compliancy and EPEAT's gold rating -- not only did it receive EPEAT's highest rating, the Portégé R600 ranks No. 1 in the gold category. Additionally, Greenpeace named the Portégé R600 the greenest laptop computer in 2009 in its second annual "Green Electronics: The Search Continues" survey.

Toshiba rates its products against an idea it calls Factor T, a mathematical formula the company created to assess a computer's consumer value against its environmental impact over its expected lifetime. High consumer value and low environmental impact equal the biggest energy efficiency.

Toshiba itself has set a company goal to double its environmental efficiency by 2010. Toshiba uses components with low-power consumption technology. Component and part suppliers that want to work with Toshiba must comply with a 22-point environmental performance survey before collaborating with the company.

Related HowStuffWorks Articles


  • "17-inch MacBook Pro: Environmental Report." Apple. 2009.
  • "Computers." Energy Star. U.S. Environmental Protection Agency.
  • "Dell Increases Global Renewable Power Sourcing To More Than 25 Percent." Dell. 2009.
  • "Dell OptiPlex 755." PC Magazine. 2008.,2817,2257975,00.asp
  • "Dell Sets New Energy-Efficiency Computing Standard to Drive Unprecedented Customer Savings." Dell. 2008.>
  • "Dell Studio Hybrid Details." Dell.
  • EPEAT.
  • "Factor T." Toshiba.
  • "Fortune 500 Challenge." U.S. Environmental Protection Agency.
  • "Green Programs." Toshiba.
  • "Greenpeace Names Toshiba Portégé R600 Greenest Notebook." Backbone Magazine. 2009.
  • Heimbuch, Jaymi. "Green Computer Smackdown: Dell Studio Hybrid Versys Advent Eco PC." Treehugger. 2008.
  • "How the companies line up." Greenpeace International.
  • "Lenovo's ThinkCentre M58p desktop PC: a leader in manageability, security and energy efficiency." Lenovo.
  • Murph, Darren. "Lenovo's ThinkCentre M58 / M58p desktops keep the green scheme alive." Engadget. 2008.
  • "The Greenest Desktop Computers of 2008." MetaEfficient Review. 2008.


What Do the Numbers Inside Recycling Symbols on Plastic Items Mean?

What Do the Numbers Inside Recycling Symbols on Plastic Items Mean?

What do the different numbers inside a recycling symbol on a plastic container mean? HowStuffWorks investigates.