Direct answer
How Much VRAM Do You Need for a 70B Model?
Approximate VRAM planning for 70B LLMs and why quantization and multi-GPU setups matter.
Question
How much VRAM do you need for a 70B model?
A 70B model needs about 140 GB for FP16 weights, 70 GB for INT8 weights, or 35 GB for INT4 weights, plus runtime overhead.
70B FP16 weights
about 140 GB
70B INT8 weights
about 70 GB
70B INT4 weights
about 35 GB before overhead
Explanation
70B models are usually too large for a single consumer GPU at FP16.
Quantization reduces the weight footprint, but context length and KV cache still matter.
For production or long-context use, plan for more memory than the weight-only estimate.