pci-e (slot) = 75w
pci-e 2.0 (slot) =150w
6-pin =75w / 108w??
8-pin=150w
These numbers are from random googling and are the complete opposite of the question you are asking
Nvidia says 236w
How many 8 pin pci-e plugs do you have , Are you using a converter that connects 2 gnd leads to fool the card?
I have no idea whats going on ,I just like typing

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