NVLink vs. SLI and Multiple GPUs - Is it worth it?
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
Zotac Trinity RTX 3090 Mod | MacRumors Forums
AORUS GeForce RTX NVLINK™ BRIDGE FOR 30 SERIES Key Features | Graphics Card - GIGABYTE Global