You really don't need NVLink, you won't saturate the PCIe lanes on a modern motherboard with dual 3090s. Tim Dettmers amazing GPU blog post posits NVLink doesn

You really don't need NVLink, you won't saturate the PCIe lanes on a modern motherboard with dual 3090s. Tim Dettmers amazing GPU blog post posits NVLink doesn't start to become useful until you are at 128+ GPUs https://timdettmers.com/2023/01/30/which-gpu-for-deep-learning/#What_is_NVLink_and_is_it_useful https://timdettmers.com/2023/01/30/which-gpu-for-deep-learni...