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3060/3070 dongle requires 1x 8-pin, where the 3080 version requires 2x 8-pin. Considering the 3060/3070 12-pin is fully connected on the card there must be some benefit for those running 12-pin dedicated cables from the PSU.
Trying to remember the traditional pinout. Think the 8-pin has 3x 12V and the other 5 are ground, so a couple could be surplus to requirements. Not seen a pinout for the 12-pin, I'll assume that the 3060 "half" version is 3x 12V and 3x ground.
All a bit odd really.
there must be some benefit for those running 12-pin dedicated cables from the PSU.
I love the 12 pin connector, it is better than the current standard, it's smaller and you get more pins.
I took the back plate of mine and tested the pins as I made my own connector, all 6 of the ground pins are connect to the circuit but only 3 of the 6 positive pins are connected.