No GPU utilization

Ollama not using GPU is commonly diagnosed by running ollama ps—if it shows 100% CPU, Ollama isn't detecting the GPU. The issue typically has multiple causes, with common ones including driver problems, insufficient VRAM, ROCm version mismatches on AMD platforms, or device visibility issues. For NVIDIA systems, fixes involve checking that nvidia-smi works and reinstalling Ollama to ensure CUDA is properly detected.

Source: r/ollama | 2026-05-05