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Categories to be used with ECMA-383
The three sets of categories listed below are to be used in conjunction with ECMA-383 3rd edition.This standard also provides the terms, definitions and specifications for the unit under test (UUT).
The procedure for maintenance of the categories is provided by ECMA-389 (procedure for the registration of categories for ECMA-383 3rd edition).
The tables below provide the latest categories that shall be used with ECMA-383 3rd edition. Historical categories.
Guidance on use of categories
In order to trace a category declared through the implementation of ECMA-383 3rd edition the categories listed below include a date extension. This extension shall be reported in the test results derived from the implementation of ECMA-383 3rd edition.
Selecting a category
To be placed in a given category the UUT shall meet all the requirements of the following category attributes:
In the case of any overlap (e.g. a UUT complying with the above category attributes of two adjacent categories) the UUT shall be placed in the lower of the two categories.
Out of scope UUT
UUT is out of scope if it exceeds the upper limit (as defined in the category) of any of the following category attributes:
When to use adders
Graphics features in a UUT above the base graphics attribute defined in the categories are treated as adders.
For example a Notebook UUT with 4 cores, 3 channels of memory and 2GB of base memory will fall into NB3 category. Any optional dGfx included in the UUT shall be treated as an adder.
For such a UUT the product shall be tested as shipped. The appropriate G1 – G7 TEC adder shall then be added to the category TEC target. The measured TEC value shall then be compared with the adjusted category TEC target to check for compliance.
The attributes defined in “selecting a category” above determine the category. If the base memory included in the UUT exceeds that of the selected category, the additional base memory shall be treated as an adder.
For example: A Desktop UUT with 2 cores, 1 channel of memory and 2 GB of base memory will fall into DT0 with the additional 1GB of base memory treated as an adder.
Other adders (such as TV cards) shall be handled in a similar manner to the above.
Ultra Low Energy Category
Any product with annualised energy consumption below 20kWh
Discrete graphics Frame Buffer BandWidth (FB_BW)
Discrete graphics definition
A graphics processor with a local memory controller interface and a local graphics specific memory.
Discrete graphics groups
The value of the adders shall be determined based on the FB_BW (measured in GB/s) and divided into 7 distinct groups specific to desktops and notebooks:
How to calculate the FB_BW
Frame Buffer Bandwidth = (Data Rate * Data Width) / (8 * 1000)
The table below shows how to calculate FB_BW for a range of memory types. Once the FB_BW has been determined the user will select the appropriate group (G1 - G5) the graphics subsystem falls into.
Guidance on setting discrete graphics adders and category TEC limits
Industry should characterise and provide idle power data for dGfx (G1 – G7) based on a significant sample size of currently shipping discrete graphics cards. Users of the data, such as regulators and voluntary agreement owners, should use the industry data-set to establish the TEC adder for the G1 – G7 discrete graphics groups.
To establish a given computer category TEC target with iGfx or dGfx – industry should report measured system TEC values together (if shipped with discrete graphics) with the type of dGfx (G1 - G7). The user of the data should then subtract the appropriate dGfx TEC adder from the product in order to establish the TEC criteria for a given category without adders applied.
The above procedure should be used for any other adder that may be applied such as TV cards.