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2.3
Electrical Considerations
2.3.1
Power Supply Considerations
CAUTION
The +5 V standby line from the power supply must be capable of providing adequate
+5 V standby current. Failure to do so can damage the power supply. The total
amount of standby current required depends on the wake devices supported and
manufacturing options.
Additional power required will depend on configurations chosen by the integrator.
The power supply must comply with the indicated parameters of the ATX form factor
specification.
•
The potential relation between 3.3 VDC and +5 VDC power rails
•
The current capability of the +5 VSB line
•
All timing parameters
•
All voltage tolerances
For example, for a system consisting of a supported 65 W processor, 1 GB DDR3 RAM,
one hard disk drive, one optical drive, and all board peripherals enabled, the minimum
recommended power supply is 300 W. Table 18 lists the recommended power supply
current values.
Table 18. Recommended Power Supply Current Values
Output Voltage
Current
INTEGRATOR'S NOTES
Ensure that the power supply used with this board meets energy efficiency
requirements measured at a system level. Intel makes no warranties or
representations that use of this board will result in a system that meets ENERGY
STAR* or European Union ErP requirements.
2.4
Thermal Considerations
CAUTION
All responsibility for determining the adequacy of any thermal or system design
remains solely with the reader. Intel makes no warranties or representations that
merely following the instructions presented in this document will result in a system
with adequate thermal performance.
3.3 V
5 V
12 V1
15 A
15 A
10 A
Technical Reference
12 V2
-12 V
10 A
0.3 A
5 VSB
3.0 A
21
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