InternLM 3 20B Instruct — VRAM Requirements
作者： Jakub Rusinowski · 最后更新： 2026年7月21日
How much GPU VRAM you need to run InternLM 3 InternLM 3 20B Instruct by Shanghai AI Lab locally, a 20B-parameter model. Figures are quantized weights + KV cache + framework overhead from a memory-bandwidth roofline model.
InternLM 3 20B Instruct needs about 13 GB VRAM at Q4_K_M.
VRAM by Quantization
| Quant | Bits/weight | Weights | Total VRAM |
|---|---|---|---|
| Q2_K | 2.63 | 6.6 GB | 7.4 GB |
| Q3_K_M | 3.41 | 8.5 GB | 9.3 GB |
| Q4_K_M | 4.83 | 12.1 GB | 12.9 GB |
| Q5_K_M | 5.67 | 14.2 GB | 15.0 GB |
| Q6_K | 6.56 | 16.4 GB | 17.2 GB |
| Q8_0 | 8.50 | 21.3 GB | 22.1 GB |
| F16 | 16.00 | 40.0 GB | 40.8 GB |
Switch quantization in the interactive calculator, or see the full InternLM 3 model page.
Add this badge to your model card
Model creators: paste this into your Hugging Face model card README to link readers straight to this VRAM breakdown.
[](https://llmconfigurator.com/en/vram-calculator/internlm3-20b)Estimates only — actual VRAM varies with context length, batch size, runtime and KV-cache settings.