NVIDIA RNAB08S1RYPP6 nvidia geforce rtx nvlink bridge 4-slot for 3090 and 30 series graphics cards
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
Nvidia To Support NVLink Only for RTX 3090 | Tom's Hardware