PCIe* AIC Auxiliary Power Connectors
The PCIe* CEM 5.0 specification defines three 12V Auxiliary Power Connectors to be used with PCIe* Add-in Cards
- 75 W 2x3 connector
- 150 W 2x4 connector
- 600 W 2x6 12VHPWR connector (new in PCIe* 5.0)
Section 5.2 specifies the Mechanical information for all 12-volt Connectors. Note that the Voltage Tolerance listed below is different from this Power Supply Design Guide for the Low voltage tolerance Table 4-2, the reason for the difference is allowing for voltage drop on a motherboard from the Main Power Connector to the motherboard to the PCIe* Edge Card Connector. Table 3-5 shows the voltage tolerance required to the PCIe* Add-in Card at both the motherboard edge card connector and Auxiliary 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 Power2, 4, 5 | 75 Watts | 150 Watts | 600 |
+ 12 V Voltage Range | +5% / -8% | +5% / -8% | +5% / -8% |
Current3, 4, 5 (Max RMS) | 6.75 Amps | 13.5 Amps | 55 Amps 1 |
- 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.