Intel ATX12VO User Manual

PCI Express* Add-in Card Considerations
613768 25
Power connectors. Each Auxiliary Power Connector must have voltage pins that belong
to the same +12V power converter if multiple voltage rails exist from the PSU.
Table 3-5: Auxiliary Power Connectors Power Supply Rail Requirements - +12V Only
+12V Power Rail
Characteristic
2x3 Connector 2x4 Connector
12VHPWR
Connector
Sustained Power
2, 4, 5
75 Watts 150 Watts 600
+ 12 V
Voltage Range
+5% / -8% +5% / -8% +5% / -8%
Current
3, 4, 5
(Max RMS)
6.75 Amps 13.5 Amps 55 Amps
1
NOTES:
The maximum current slew rate for the 12VHPWR connector interface shall be no more
than 5.0 A/µs.
Maximum sustained power is an average power in any continuous 1 second interval
Maximum of root-mean-square (RMS) of current in any continuous 1 second interval
The main reference limit is the maximum allowed sustained power per connector and
Add-in Card type. Add-in Card and System must concurrently comply with all power
and voltage and current requirements in this table for the applicable connector and
other requirements in this specification for the Add-in Card type.
Maximum instantaneous and other excursions exceeding these limits are defined in
Section
3.1 of this document.
3.3 PCIe* Add-in-Card Auxiliary Power Connectors
Sideband Signals
The new 12VHPWR connector has 4 sideband signals defined that communicate
between the Power Supply and the PCIe* Card. Two of these sideband signals are
required with the connector and two of them are optional from the Power Supply. The
four sideband signals are:
• SENSE0
• SENSE1
• CARD_PWR_STABLE
• CARD_CBL_PRES#
For the most up to date and detailed description, refer to Section 5.3
– Optional
Sideband Signal in the PCI Express* Card Electromechanical Specification, Rev
5.0. That document is available from
www.pcisig.com.
3.3.1 Sense1 / Sense0 (Required)
These two sideband signals provide important information from the PSU to the Add-in
Card and are therefore required from the power supply. These signals allow the PSU to
tell the Add-in Card how much power the Add-in Card can use during both Initial
Power Up and Maximum Permitted Power. In the PCI CEM Gen 5 spec these levels are
called “Connector Initial Permitted Power” and “Connector Maximum Permitted Power”
because they refer to the power limits that can be consumed thorough the Auxiliary

Intel ATX12VO Specifications

General

Brand	Intel
Model	ATX12VO
Category	Power Supply
Language	English