Ok, I’m back. You may want to read through this link:
GOU mining electrical specifications
It says the specifications are 75w through the 6pin and 150w through the 8pin. HOWEVER, it also says that the wires can handle more (though I forget the wording; please check it out!).
Also, I forgot to mention before, but I run them all at about 70% TDP. The 1080 might be at 65%; I set them based on temperature and decided I didn’t want to unlock them to bump the power up. That rig runs at about 1230-1250w at the wall according to the kill-a-watt.