NVLink

NVIDIA’s high-speed GPU-to-GPU interconnect that provides much higher bandwidth than PCIe for multi-GPU communication. NVLink is critical for multi-GPU training and large-model inference where GPUs need to exchange data constantly. Consumer GPUs (RTX series) do not support NVLink — it’s limited to data-center cards like the A100 and H100. If you’re building a multi-GPU consumer rig, you’ll be using PCIe, which is slower but still workable for many setups.