Re: supplemental 6 pin pcie power on lower left of motherboard.
2018/08/05 22:29:17
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Ok so if you got an X299 Dark it is optional if only running one card. This is straight off of the Evga Manual;
"8. Supplemental PCIe 6-pin Power Connector There is a 6-pin PCIe connector at the bottom of the motherboard (See Page 48 for more specifics to the connector itself, and associated wiring/pinouts). This connector provides dedicated power to the PCIe x16 slots, augmenting the +12V power provided by the 24-pin and the GPU directly. This is optional for a single card solution, but is recommended for SLI, CFX, and dual-processor video cards".