How We Actually Run 70B LLMs Locally on Consumer GPUs Without Crashing VRAM
We spent two weeks benchmarking Llama-3.3-70B and Qwen-2.5-72B across RTX 3060, 4070, and dual 3090 rigs. Here is the exact breakdown of layer splitting, KV cache quantization, context shifting, and why naive offloading usually fails.