Blender running very slow Blender is running extremely slow for me. I am just in the edit mode in the 3D-Viewport and just moving a few vertices takes like 4-5 seconds. I am working on very simple models and when I look at the performance in my task manager my GPU stay under 10%, my CPU is around 20% and I am using around 30% of my memory. 
The same project ran fine just yesterday.

What I have tried:
- Restart Blender
- Restart PC
- Check for updates of basically everything
- Activate CUDA  

Running:
v2.79
gtx970m
i7-4710HQ
16 GB
Do you have any modifiers on your project? If so try hit the little eye icon, so you cant "see" it. It will still be rendered, but your pc wont have to work so hard while you are still working on your project.