Ollama is not using the 100% of RTX4000 VRAM (18 of 20GB)

Hi, thank you for the wonderful ollama project and the amazing community! <img width="742" alt="Screenshot 2024-03-12 at 8 32 31 AM" src="https://github.com/ollama/ollama/assets/16274031/a47d6ad9-3602-4ffe-984d-0ec858f95b6f"> I am testing the Mixtral 3Bit Quantized model under a RTX400 with 20GB of VRAM. The model is 20GB of size and as you can see in the screenshot of nvidia-smi, ollama is using only 18GB and the rest of the model was loaded to the system RAM. Is this normal? or is it an issue?, Can I force ollama to use the 100% of VRAM?, thank you!!!