NVLink
NVIDIA's high-bandwidth GPU-to-GPU interconnect for tying many GPUs into one memory-coherent scale-up domain.
Also written as: NVLink5 · NVLink-C2C
Current numbers
1st rack validated 2026-06-01CoreWeave-reported industry-first Vera Rubin NVL72 rack, validated 1 June 2026: ~3.6 EFLOPS sparse NVFP4, 216 TB/s NVLink 6
1.8 TB/s bidirectional (~0.9 TB/s per direction)NVLink 5 per-GPU bandwidth (~130 TB/s per GB200/GB300 NVL72 rack): ~18x GB200’s 400 Gb/s NIC, ~9x GB300’s 800 Gb/s
3.0 TB/sNVLink 6 per-GPU bandwidth (Vera Rubin, shipping spec); 900 GB/s Hopper, 1.8 TB/s Blackwell; ~216 TB/s per NVL72 rack