Verified80% confidenceFactExact time
NVLink 4.0 offers a bidirectional bandwidth of up to 900 GB/s, while cross-node InfiniBand HDR offers only approximately 50 GB/s, a gap of nearly 20 times.
4
Sources
80%
Confidence
Long-term
Relevance
7/7/2026
First Seen
Sources
非均匀张量并行：NVIDIA提升LLM训练Goodput的容错新方案
rss7/6/2026
Related Claims
VerifiedNVLink 4.0 (used in the H100) can achieve a unidirectional bandwidth of 900 GB/s.81% similarVerifiedNVLink 4.0的双向带宽高达900GB/s，而传统PCIe总线带宽约为64GB/s81% similarUnverifiedNVIDIA's H100 is equipped with 80 GB HBM3, delivers memory bandwidth of 3.35 TB/s, and NVLink 4.0 provides 900 GB/s bidirectional bandwidth.76% similarUnverifiedHDR InfiniBand提供200 Gb/s带宽与微秒级延迟76% similarUnverified降规版A800将NVLink带宽限制在400GB/s74% similar
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