Please provide more details, and FULL PC specs. Which cable did you plug in the GPU, PCI-E/PEG connector ? What's the exact model and brand of your GTX 1060 ? Does it feature the FAN STOP 0db technology, meaning the fans won't spin in IDLE mode, when TEMP is less than 60 C ??
During the POST process, the fans will start, and then stop, but only on those GPUs which have this 0db Feature.