12-06-2021, 01:07 PM
The 12V on the PCIe connector comes from the DC in socket, so however much your DC power supply is able to provide, minus whatever the rest of the system uses through the PMIC's DC-to-DC converters.
The 3.3V on the PCIe connector is DC-to-DC converted from the 12V input by an SY8113B, which can deliver 3A of current according to its data sheet.
So in short, 3A*3.3V = 9.9W on the 3.3V rail, and north of 50W on the 12V rail depending on how beefy your DC power supply is.
If your card only draws wattage from the 3.3V rail, you might get in trouble, but if it has its own DC-to-DC circuitry to convert the 12V input, you're all good.
The 3.3V on the PCIe connector is DC-to-DC converted from the 12V input by an SY8113B, which can deliver 3A of current according to its data sheet.
So in short, 3A*3.3V = 9.9W on the 3.3V rail, and north of 50W on the 12V rail depending on how beefy your DC power supply is.
If your card only draws wattage from the 3.3V rail, you might get in trouble, but if it has its own DC-to-DC circuitry to convert the 12V input, you're all good.
Occasional Linux Kernel Contributor, Avid Wiki Updater, Ask Me About Quartz64
Open Hardware Quartz64 Model A TOSLink Adapter
Pi-bus GPIO Extender For ROCKPro64 And Quartz64 Model A
Plebian GNU/Linux
