Unverified70% confidenceFactExact time
The HBM interface bus width of NVIDIA's H100 reaches 5120 bits, far exceeding the 384 bits of conventional graphics memory.
2
Sources
70%
Confidence
Long-term
Relevance
7/11/2026
First Seen
Sources
Related Claims
UnverifiedThe NVIDIA Tesla V100 has a 32GB VRAM version that uses HBM2 high-bandwidth memory.75% similarUnverifiedHBM has an extremely wide physical bus width (up to 1024 bits or higher), enabling it to deliver far greater memory bandwidth than GDDR at lower frequencies75% similarUnverifiedHBM4 increases the bottom interface bus width from the 1024-bit of HBM3E to 2048-bit.75% similarUnverifiedThe current maximum capacity of a single HBM3e stack is approximately 36 GB, the DDR5 bus width is only 64 bits, whereas HBM can reach 4096 bits.74% similarUnverifiedH100显存带宽为3.35 TB/s HBM3，RTX 5090为1792 GB/s GDDR774% similar
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