PCIe AUX Power

The Alveo V80 accelerator card has two 8-pin PCIe AUX power connectors, AUX1 and AUX2, that each provide 150W additional power. While the card will operate without either AUX power connected, power to the QSFP cages, DDR, and DIMMs requires at least one AUX cable to be connected. The location of the PCIe AUX power connectors is shown in the following figure.

Note: The PCIe AUX 8-pin connector is not compatible with an ATX12V/EPS12V power cable source. Ensure that the appropriate PCIe auxiliary power source is available, and not an ATX12V/EPS12V power source. For more details, see Answer Record 72298.

Figure 1. AUX Power Connector Locations

The following table shows the maximum power available with and without AUX 2x4 power cables connected. At a minimum, the 75W PCIe slot power is always used.

Table 1. Power Availability
AUX Power Configuration	Maximum Power Available AUX 2x4
No AUX power cable connected¹	75W
Two AUX power cables connected	300W²
QSFP cages, DDR, and DIMMs are not powered. Maximum card power is limited by the TDP given in Table 1.