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Desktop computer

Top10 China presents the most energy efficient and money saving desktop computers on the Chinese market.

1. Scope

The power of the selected desktop computers should be less than 750W。

The selected desktops could not have 2 or more than 2 independent display units.

2. Selection criteria

To be selected in the Top10 product list, the desktops’ typical energy consumption (kWh) should not exceed the following values:

Desktop type

Typical energy consumption (TEC) (kWh)

Low-end

≤107.5

Middle class

≤205

High-end

≤137.6

3. Terms

Electricity cost (5 years): The electricity cost of the desktops in 5 years. The price of the electricity is set at 1.0 RMB/kWh. Unit: RMB.

Low-end products: the CPU core is 2 and the system memory capacity is equal or greater than 2GB.

Middle class products: The CPU core of the desktop is bigger than 2 and the system memory capacity is equal or greater than 2GB, or the CPU core of the desktop is bigger than 2 and with an independent graphic display unit.

High-end products: The CPU core of the desktop is equal or greater than 4 and the system memory capacity is equal or greater than 4GB, or the CPU core of the desktop is equal or greater than 4 and the desktop with an independent graphic display unit. The memory interface is greater than 128 bit.

TEC (Typical Energy Consumption): The annual energy consumption of the desktop according to the test methodology ofChina efficiency standard GB 28380 – 2012. Unit: kWh

The lower the TEC of the computer, the more efficient it is.

TEC = (8760/1000)*(Poff*Toff+Psleep*Tsleep+Pidle*Tidle)

 

States

Time percentage

Toff

55

Tsleep

5

Tidle

45

 

P- All kinds of power of a computer, unit: kW

T- The percentage of the computer’s various conditions, the specific value is provided by the national standard.

Turn off state: this is the lowest power consumption when a computer is connected to the electricity; this kind of consumption will probably be a timeless one and the customer cannot avoid it. (unless unplugged)

Sleeping state: the computer will automatically be in a lower consumption state after a period of nonworking conditions.

Idle state: the period when the program is loaded and in a acquiescent state before the sleeping state.

National energy efficiency grade: this is the mandatory grading system for energy using products to disclose the energy performance to the consumers. Grade 3 is the minimum energy efficiency and Grade 1 is the best.

4. References

GB 28380 – 2012 minimum allowable values of energy efficiency and energy efficiency grades for microcomputers

5. Data sources

China Energy Labeling Program http://www.energylabel.gov.cn

Zhongguancun online http://www.zol.com.cn

Manufacturers

All the information presented at Top10 China comes from public available information sources. If you think you spot an error, please report to info@top10.cn.

Producers and retailers are kindly asked to contact info@top10.cn about more products which meet the Top10 selection criteria.

2017/4