GPU-Z Doesn't Show Temps

I have a Lenovo T410s with an nVidia NVS 3100m gpu. I downloaded gpu-z to watch the temperatures, but there's no temp sensor showing up. I've seen on some notebook forums that other people with this gpu see the temperature. Any ideas?

Because

Yo

I think the temps do not show up on GPU-Z because the graphics card does'nt have built in temprature sensors..