the_Scarlet_oneAMD doesn't report PCIe Slot power draw through GPU-z only Voltage, and prior to the 3090ti, most GPU's from NVidia leveraged up to the 75w with no problem.  

They don't, but THG and Buildzoid built rigs that measured it when proving AMD's RX 480 cards were overdrawing the 75W slot limit by ~15w. Can confirm my 1080 Ti is drawing around 40-60w from the PCIe slot depending on Folding project. 

ASUS TUF 4090 OC here and the most I've seen for PCI slot draw is around 12~14W in Port Royal using the updated BIOS V95.02.18.80.AS05. I haven't tweaked voltages yet (and it appears I can) but I have the power target slider set to 133% and +120 GPU, +1400 Memory. 

Posted this in its own thread with more details, but GN has made a more in depth video about the 12VHPWR cables.