Every GPU has vram, right
In the past we didn't have vram temps because we didn't need
, now it's more common specially after mining
Usually the GPUs have:
AMD - 3 sensors
Nvidia - can come with 1 sensor, 2 or 3, depends on the model
Special edition GPUs or high end GPUs can have more sensors, like this EVGA:
But this is not the standard, to put more sensors manufacturers need to charge more for the card
This concept of "norm" like you said, is not the right thing to say, we can say it depends where the sensor is, so it's common to have on the gpu and memory (vram)