Intel ATX 3.0, Design Manual

Page: 45 / 89

Electrical
336521 45
4.5.9 Power Supply Efficiency for Energy Regulations - ENERGY
STAR* and CEC (California Energy Commission) PC
Computers with High Expandability Score -
RECOMMENDED
The efficiency of the power supply should be tested at nominal input voltage of 115
VAC input and 230 VAC input, under the load conditions defined in the form factor
specific sections, and under the temperature and operating conditions defined in
Chapter 7 . The loading condition for testing efficiency represents fully loaded systems,
typical (50%) loaded systems, and light (20%) loaded systems. For systems being
sold into the state of California that meet the High Expandability Computer definition
(details at the referenced CEC website below) are required to meet the efficiency
target list in Table 4-16
:
Efficiency
versus Load for CEC PC Computers with High
Expandability Computers*
.
Visit ENERGY STAR* Computers Ver.8 (ES v8) website for more details:
•
https://www.energystar.gov/products/spec/computers_version_8_0_pd
Visit CEC* website for more details:
•
https://www.energy.ca.gov/rules-and-regulations/appliance-efficiency-regulations-
title-20 or
•
https://energycodeace.com/content/reference-ace-t20-tool then select section “(v)
Computers…”
Note: check ENERGY STAR* and CEC website for the latest specification update.
Table 4-15: Efficiency versus Load for ENERGY STAR*
Loading
Full
Load
(100%)
Typical
Load
(50%)
Light
Load
(20%)
PFC @
50%
load
Remarks
RECOMMENDED
Minimum Efficiency
82% 85% 82% ≥ 0.9
ES v8 for
500W and below
RECOMMENDED
Minimum Efficiency
87% 90% 87% ≥ 0.9
ES v8 for
above 500W
Table 4-16: Efficiency versus Load for CEC PC Computers with High Expandability
Computers*
Loading
Full
Load
(100%)
Typical
Load
(50%)
Light
Load
(20%)
PFC @ 50%
load
REQUIRED Minimum Efficiency for 115V
PSU
87% 90% 87% ≥ 0.9
REQUIRED Minimum Efficiency for 230V
PSU
88% 92% 88% ≥ 0.9