I have bought a dell latitude e7450 recently (i7-5600U; 16gb ram ddr3; 8gb graphics memory  intel 5500 nvidia geforce 840m; win 10 pro) I want to know if my geforce is really working because I can't find nvidia control panel and the drivers for nvidia are not there. The thing that surprises me is that my system shows 8gb active which I doubt intel 5500 can support. Also any idea why task manager says gpu usage and gaming bar doesn't even flinch a bit even with 4k videos playing? Gaming bar is stuck at 7.9 gb free. Can I fix both of these? Thanks!