3x 8-pin power connections? WOW
It's overclocking headroom excess. 2x8 + PCIe16 gives 375W total power (365W @12V) vs 320/350W for the 3080/3090 at factory speeds. I feel it's mostly excessive because under volting results have shown you can drop power by ~30% for a ~5% FPS drop; meaning NViidia has slammed the cards into the perf/watt wall really hard implying there's little to be gained by feeding them more power.