5080 FE, 16-pin input voltage sensor is reporting low voltage only when the card is cold even on low power consumption (idling on desktop @ ~27w)
~35C 11.89v / ~45C 11.97v
The higher the temperature, the smaller the difference between 16-pin and PCIe input voltage.
As the card warms up, the voltage increases proportionally with the temperature, reaching up to 12.0V.
Voltage measured right on the 16-pin plug using a fluke tool is very stable at >12.01v no matter the load.
I have already replaced the cables - no difference.
My question to @Martin is, are these values read directly from the GPU power monitoring IC or somehow calculated based on some other values?
If they're coming directly from the GPU as-is then it's probably a bad (uncalibrated?) sensor.
HWINFO screenshot showing the difference. (It's worse if the temperature is lower than 30C to ~11.75v which makes no sense)
Quick video showing the voltage dropping as the card cooling down by manually enabling the fans.
~35C 11.89v / ~45C 11.97v
The higher the temperature, the smaller the difference between 16-pin and PCIe input voltage.
As the card warms up, the voltage increases proportionally with the temperature, reaching up to 12.0V.
Voltage measured right on the 16-pin plug using a fluke tool is very stable at >12.01v no matter the load.
I have already replaced the cables - no difference.
My question to @Martin is, are these values read directly from the GPU power monitoring IC or somehow calculated based on some other values?
If they're coming directly from the GPU as-is then it's probably a bad (uncalibrated?) sensor.
HWINFO screenshot showing the difference. (It's worse if the temperature is lower than 30C to ~11.75v which makes no sense)
Quick video showing the voltage dropping as the card cooling down by manually enabling the fans.
