8pin vs 2x8pin GPU

_dawn_chorus_

Distinguished
Aug 30, 2017
563
56
19,090
I am looking specifically at the EVGA 1080 SC2 & FTW2 models, which other than about 12 MHz Base/Boost clock difference are identical but the FTW2 requires a 2x8pin plug and has a TDP of 35w more than the SC2.

Is this just for overclockability? Otherwise what would be the point of it having that much extra power draw potential?