Unverified50% confidenceFactExact time
In a scenario with a 128K context and batch size 16, the KV Cache can occupy nearly two-thirds of total GPU memory (45%-65%).
1
Sources
50%
Confidence
Long-term
Relevance
10/14/2026
First Seen
Sources
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Related Claims
UnverifiedWith a 64K context, batch=2, and FP16 KV Cache, the KV Cache usage of this 70B model is about 39.06 GiB.70% similarUnverifiedIn long-context scenarios (such as models with a 128K token window), the GPU memory occupied by the KV Cache may exceed that of the model weights themselves.68% similarVerifiedFor a model with 70B parameters, the KV Cache for an 8K context may occupy several additional gigabytes of VRAM63% similarUnverifiedEach global layer of Spark X 2.5 stores approximately 4 KB of KV cache per token; across 9 layers this amounts to approximately 37 KB per token, reducing KV cache usage to approximately one-quarter of the approach where every layer records the full text63% similarVerifiedTaking LLaMA-2 70B as an example, when processing a 4096-token context with a batch size of 32, the KV Cache can consume over 80 GB of memory.62% similar
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