Unverified50% confidenceFactExact time
The Windows system, background programs, GPU reservations, and so on first take a portion of memory from the unified memory pool, resulting in a gap between nominal memory and model-usable memory.
1
Sources
50%
Confidence
Long-term
Relevance
10/25/2026
First Seen
Sources
64GB Laptop Running LLMs: Only 46.7GB Actually Usable
bilibiliAIPC煜森10/23/2026
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UnverifiedMemory leaves traces in LLM systems at multiple levels—including the explicit storage layer, summary layer, context cache layer, and indirect reasoning layer—forming memory residuals.77% similarUnverifiedExplicitly specifying in the prompt that the file system should be used to store memory locks the model's solution space, preventing it from exploring other approaches on its own (such as virtual memory or databases).75% similarUnverifiedWhen a model file exceeds the GPU's VRAM, the overflow portion falls back to system memory for processing, causing a significant drop in speed.75% similarUnverifiedSystem memory and VRAM are two different memory pools and cannot simply be added together to equal total available VRAM.75% similarUnverifiedA complete memory system generally needs to include write filtering of memories, time-based decay or version overwriting, and compression and summarization after recall.74% similar
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