More details about the GeForce RTX 3090 Ti have emerged, a few days before the card's rumoured announcement and release. NVIDIA's partners will sell the RTX 3090 Ti with up to a 3.5-slot design, while the card's power requirements call for new power cables.
https://www.notebookcheck.net/NVIDIA-GeForce-RTX-3090-Ti-Custom-cards-to-feature-up-to-a-3-5-slot-design-as-3x-8-pin-power-connector-leaks-to-cover-monstrous-power-requirements.610109.0.html