Verified65% confidenceTradeoffExact time
分层加载导致推理速度受限，其根本原因是 PCIe 总线带宽（PCIe 4.0 理论带宽约 32GB/s）远低于 GPU 内部显存带宽
3
Sources
65%
Confidence
Long-term
Relevance
7/19/2026
First Seen
Sources
Related Claims
Unverified大模型推理速度往往不受限于算力（FLOPS），而受限于内存带宽；PCIe 4.0 x16理论带宽约32GB/s，GPU显存带宽（GDDR6X约1TB/s）相差30倍以上84% similarUnverifiedPCIe 4.0 x16 bandwidth is approximately 64GB/s, and each transfer requires an explicit cudaMemcpy call, which is a significant bottleneck in latency-sensitive inference scenarios.83% similarVerifiedPCIe 4.0 x16的理论带宽约为32GB/s81% similar
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