I want to know if i can run enscape with a NVIDIA GEFORCE 820M
... why not simply install the Enscape trial and give it a try?
LORENZO , thanks for your post and welcome to our forum. First off, you can check out our system requirements here, and sign up for our free 14-day trial here. If your GEFORCE 820M has 2GB of VRAM, you shouldn't run into problems - anything below that and you will probably have to upgrade your GPU to make use of Enscape.
Let me know in case you have any further questions regarding Enscape what so ever.