Unverified50% confidenceFactExact time
大型语言模型推理需将数GB至数十GB模型权重通过PCIe总线从主机内存搬运至显存，受限于PCIe Gen4/Gen5物理带宽上限约64GB/s
1
Sources
50%
Confidence
Long-term
Relevance
7/10/2026
First Seen
Sources
Reverse-Engineering CUDA-checkpoint: The Technical Principles and Practice of Cracking GPU Cold Starts
hackernewshackernews7/9/2026
Related Claims
Unverified分层加载导致推理速度成为代价，需要频繁在存储设备与显存之间搬运数据，PCIe 4.0 x16 理论双向带宽约为 64GB/s76% similarUnverifiedQuantization can compress the storage size of a 70-billion-parameter model from approximately 140 GB in FP16 to approximately 35–40 GB in INT4, enabling it to run on consumer-grade hardware such as a single RTX 4090 with CPU memory offloading.74% similarUnverifiedFor a typical 70-billion-parameter model, the KV cache occupies approximately 0.5 MB of memory per token, and generating 100,000 tokens requires carrying 50 GB of cache.73% similarVerifiedThe speed bottleneck in large model inference is memory bandwidth rather than insufficient computing power, as generating each token requires loading hundreds of GB of model weights from memory.73% similar
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