Originally Posted by Brusfantomet
I am guessing that its not possible to get someone to explain how GPU-z gets the temps, but is it possible for it to start in minimized mode ?.
I am guessing that what SirReal says still holds true, one instance of GPU-z now gives you the temps of all your GPUs
There is not a single way, it depends on the card, OS, driver etc.
GPU-Z has a -minimized command line parameter you can use.