1080gtx into x51 r2

[d2_samus]

I decided to buy a friends 1080 gtx for $325. I heard people are able to play it with a 330w ac adaptor. To lower the amount of watts comsume, I remove an extra Corsair fan, a smal fan by gpu (this needed to be done for space), change hdd to ssd. With my 1060 it consumes 180s-190s watts at its peak. I test this with an electricity monitor. When I try to connect a 6pin to 8pin. I heard that a 6 pin can transfer 75watts. The system came with a 6pin to x2 6pins. Do I need to use the system 6pin(m) to x2 6pin (m) and connect a x2 6pin (f) to a 8pin?
How can that get more energy if the initial is a 6pin which transfer 75watts?
I seen people on YouTube and other board being able to do it. Anyone have any idea?

 

[d2_samus]

*update:
I was able to make it work. Connecting a 6pin to x2 6pin and x2 6pin to 8pin. I run into a little problem while running heaven benchmark. My system kept on shutting off. I use msi to underclock -300 core because even at -200 it will still crash. I check my computer power consumption and at peak was 280 watts. That’s 100 more watts than with 1060gtx. The GPU after about 20 min of benchmark it reach a highest of 88 degrees and seem to keep at 86. I think that’s high.
I was thinking I could steal power from another 6 pin connector. However, even if it work the gpu will overheat. Right now is finding a way to cool off the gpu.