TL;DR: NVIDIA's RTX 5090 graphics card requires 4 x 8-pin connectors for 600W power officially, but can operate with 3 x 8-pin connectors at 450W, seemingly running only 5% slower in 4K benchmarks.
Well... it looks like RTX 4080 SUPER graphics cards with dual 8-pin PCIe power connectors could hopefully be something we see in the near future. Palit's new GeForce ...