AI Algorithm Path

Mar 10, 2025 · Artificial Intelligence

How Much GPU Memory Does an LLM Service Really Need?

This article explains a simple formula for estimating the GPU VRAM required to serve large language models, demonstrates the calculation with a 7‑billion‑parameter example, clarifies why a 20% safety buffer is needed, and offers practical strategies such as quantization, CPU offload, and multi‑GPU parallelism to reduce memory usage.