Ranking Criteria: The most energy-efficient computers, ranked by annual electricity consumed in typical usage
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#1

Hewlett-Packard Company
ENVY x2 -11

This is a 2-in-1 tablet and notebook device with a 11.6-inch detachable screen and an Intel i5 processor.

Energy Details
Energy Savings
Annual energy savings compared to average Energy Star model this size: 20.9 kWh/year
Energy Use
Standby/Sleep power use (watts): 0.7
Energy Use
Annual Energy Use: 4.3 kWh/year
Energy Use
The most energy-efficient computers, ranked by annual electricity consumed in typical usage: 4.3 kWh/year
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#2

Apple Inc.
MacBook Air - MD711

This is a thin and ultra-portable notebook computer with a 11.6-inch screen and an Intel i5 processor.

Energy Details
Energy Savings
Annual energy savings compared to average Energy Star model this size: 19.5 kWh/year
Energy Use
Standby/Sleep power use (watts): 0.7
Energy Use
Annual Energy Use: 4.3 kWh/year
Energy Use
The most energy-efficient computers, ranked by annual electricity consumed in typical usage: 5.7 kWh/year
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#3

Acer Incorporated
Iconia W510 - 1422

This is a 2-in-1 tablet and notebook device with a 11.6-inch detachable screen and an Intel Atom processor.

Energy Details
Energy Savings
Annual energy savings compared to average Energy Star model this size: 20.9 kWh/year
Energy Use
Standby/Sleep power use (watts): 0.7
Energy Use
Annual Energy Use: 4.3 kWh/year
Energy Use
The most energy-efficient computers, ranked by annual electricity consumed in typical usage: 9.1 kWh/year
Energy Star Partner

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#4

Hewlett-Packard Company
HP Spectre 13 Ultrabook

This is a 2-in-1 tablet and notebook device with a 13.3-inch detachable screen and an Intel i5 processor.

Energy Details
Energy Savings
Annual energy savings compared to average Energy Star model this size: 16.0 kWh/year
Energy Use
Standby/Sleep power use (watts): 0.6
Energy Use
Annual Energy Use: 4.3 kWh/year
Energy Use
The most energy-efficient computers, ranked by annual electricity consumed in typical usage: 9.2 kWh/year
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#5

Samsung
NP740U3E

This is a thin and portable notebook computer with a 13.3-inch screen and an Intel i5 processor.

Energy Details
Energy Savings
Annual energy savings compared to average Energy Star model this size: 18.5 kWh/year
Energy Use
Standby/Sleep power use (watts): 0.8
Energy Use
Annual Energy Use: 4.3 kWh/year
Energy Use
The most energy-efficient computers, ranked by annual electricity consumed in typical usage: 13.2 kWh/year
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#6

Lenovo
ThinkPad T440

This is a thin and portable notebook computer with a 14.0-inch screen and an Intel i3 processor.

Energy Details
Energy Savings
Annual energy savings compared to average Energy Star model this size: 18.5 kWh/year
Energy Use
Standby/Sleep power use (watts): 0.4
Energy Use
Annual Energy Use: 4.3 kWh/year
Energy Use
The most energy-efficient computers, ranked by annual electricity consumed in typical usage: 13.3 kWh/year
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#7

Lenovo
G710

This is a thin and portable notebook computer with a 17.3-inch screen and an Intel i3 processor.

Energy Details
Energy Savings
Annual energy savings compared to average Energy Star model this size: 18.0 kWh/year
Energy Use
Standby/Sleep power use (watts): 0.7
Energy Use
Annual Energy Use: 4.3 kWh/year
Energy Use
The most energy-efficient computers, ranked by annual electricity consumed in typical usage: 13.7 kWh/year
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#8

Lenovo
Lenovo IdeaPad Z710

This is a thin and portable notebook computer with a 17.3-inch screen and an Intel i7 processor.

Energy Details
Energy Savings
Annual energy savings compared to average Energy Star model this size: 17.2 kWh/year
Energy Use
Standby/Sleep power use (watts): 0.7
Energy Use
Annual Energy Use: 4.3 kWh/year
Energy Use
The most energy-efficient computers, ranked by annual electricity consumed in typical usage: 14.5 kWh/year
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#9

Hewlett-Packard Company
HP ENVY SpectreXT -13

This is a thin and ultra-portable notebook computer with a 13-inch screen and an Intel i5 processor.

Energy Details
Energy Savings
Annual energy savings compared to average Energy Star model this size: 38.4 kWh/year
Energy Use
Standby/Sleep power use (watts): 0.5
Energy Use
Annual Energy Use: 4.3 kWh/year
Energy Use
The most energy-efficient computers, ranked by annual electricity consumed in typical usage: 15.9 kWh/year
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#10

Lenovo
IdeaPad U510

This is a thin and ultra-portable notebook computer with a 13-inch screen and an Intel i5 processor.

Energy Details
Energy Savings
Annual energy savings compared to average Energy Star model this size: 35.7 kWh/year
Energy Use
Standby/Sleep power use (watts): 0.7
Energy Use
Annual Energy Use: 4.3 kWh/year
Energy Use
The most energy-efficient computers, ranked by annual electricity consumed in typical usage: 18.6
Energy Star Partner

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Category Last Modified: February 7, 2014