gpu not recognised

I'm using a Asus X550CC, with the below mentioned specs: i3-3217u Nvidia GT720M 8gb ram 256SSD+500HDD Windows 10 64bit (19042.1052) What's wrong? Until yesterday, everything was running fine, today i started the laptop and all of a sudden the laptop fan was running at full speed, no problems...

it black screened as soon as a stopped an installation of DS4WINDOWS when i realised i can use ps4 controllers on steam games. everything we have tried wont recognise it. i tried flashing it with a usb but not even that is showing up i have a feeling i may have fried it but i dont remember...