EVGA Z170 STINGER (111-SS-E172)
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6pin PCIE
The 6pin PCIE connector present on the motherboard is there to provide
additional power to the PCIE slots rather than pulling it all from the 24 pin
main power. It is advised when using SLI especially with higher power draw
cards, 3 and 4 way SLI it is strongly recommended to use this, regardless of
GPU.