Verified70% confidenceFactExact time
NVLink 4.0 (used in the H100) can achieve a unidirectional bandwidth of 900 GB/s.
4
Sources
70%
Confidence
Long-term
Relevance
7/13/2026
First Seen
Sources
P2P学生GPU共享网络：技术可行性与现实挑战全解析
redditr/deeplearning7/12/2026
Related Claims
VerifiedNVLink 4.0 has a bidirectional bandwidth of up to 900 GB/s, while the bandwidth of a traditional PCIe bus is approximately 64 GB/s.85% 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.84% similarUnverified降规版A800将NVLink带宽限制在400GB/s84% similarVerifiedIn the H100 NVLink architecture, 8 GPUs within a single server can be fully interconnected via NVSwitch, achieving a total bandwidth of 900 GB/s, an order-of-magnitude improvement over PCIe 5.0's 64 GB/s.83% similarVerifiedNVLink 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.81% similar
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