Originally Posted by PeterOC
I'd love to have a read on that. Not sure what you mean though. The input power pins to GPU are set, so you can't override 6+8 pin and thus max power as far as I see it. Unless this is another mod
Look up the shunt mod.
From my understanding the PSU will give whatever current a device asks it up to a certain limit, and those are high limits.
A MSI 1080 Ti can draw 150 Watts from a 6-pin of a PSU if you use an adapter. So being 6-pin from the PSU doesn't stop it.
The shunt mod tricks the card into thinking it's drawing in less power and allows for you to draw more power out of the 8+6 pins.
Originally on Maxwell cards, you could modify the bios and actually increase the amount of current the 8 and 6 pins were allowed to draw. We do not have unlocked bios and this luxury on pascal cards anymore. That's why we are trying to find bios that have been written to draw more than 300 Watts. But so far it hasn't worked out that well. It seems the bios are written specifically for the hardware that's present on the card.
Hence, shunt mod has become the go to method to get more power.