Intel ATX 3.0, Design Manual

Page: 52 / 89

Mechanical
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•
Flammability: UL94V-1 Minimum - Material certification or certificate of compliance
is required with each lot to satisfy the Underwriters Laboratories follow-up service
requirements.
• Lead Free Soldering: Connector must be compatible with lead free soldering process
Table 5-5: PCIe* 2x4 Auxiliary Power Connector Pin Assignment (150 Watts)
Pin Signal Color 1 Pin Signal Color 1
1
+12V3/V4 Yellow
5
COM Black
2 +12V3/V4 Yellow 6 Sense0 Black
3
+12V3/V4 Yellow
7
COM Black
4
Sense1 Black
8
COM Black
NOTE: 18 AWG wire.
Table 5-6: PCIe* 2x4 Auxiliary Power Connector Sense Pin Decoding by AIC
Sense 1 Sense 0 Description
Ground Ground
A 2x4 connector is plugged into the card. The card can draw
up to 150 W from the auxiliary power connector
Ground Open Reserved
Open Ground
A 2x3 connector is plugged into the card. The card can only
draw up to 75 W from the auxiliary power connection
Open Open No auxiliary power connector is plugged in
For a sense pin that needs to be grounded, it must be connected to ground either
directly in the power supply or via a jumper to an adjacent ground pin in the
connector
5.2.2.4.3 PCI Express* (PCIe*) 12VHPWR Auxiliary Power Connector (Optional
for PSU ≤ 450 Watts, Required for PSU > 450 Watts)
The 12VHPWR Auxiliary Power connector is designed to deliver up to 600 watts
directly to a PCIe* Add-in Cards. This power connector is not compatible with the
existing 2x3 or 2x4 auxiliary power connectors. The 12VHPWR connector power pins
have a 3.0 mm spacing while the contacts in a 2x3 and 2x4 connector are on a larger
4.2 mm pitch. The 12VHPWR auxiliary power connector includes twelve large contacts
to carry the power and four smaller contacts beneath carrying the sideband signals.
The connector performance requirements are as follows:
• Power Pin Current Rating: (Excluding sideband contacts) 9.2 A per pin/position with
a limit of a 30 °C T-Rise above ambient temperature conditions at +12 VDC with all
twelve contacts energized. The connector body must display a label or embossed
H+ character to indicate support of 9.2 A/pin or greater. Refer for the approximate
positioning of the marker on the 12VHPWR Right Angle (R/A) PCB Header.