Early Blender benchmarks suggest that two NVIDIA GeForce RTX 3080 cards would outperform a single GeForce RTX 3090 had NVIDIA included NVLink support - NotebookCheck.net News
Universal Rtx 3090 Series Dual Graphics Sli Crossfire Bridge Support Nvidia Sli Connector Two Way 8cm Nvlink - Pc Hardware Cables & Adapters - AliExpress
Red Dead Redemption 2 - RTX 3090 NVLINK / SLI vs 3090 Single | 4K Ultra setting - YouTube