Re: running on-board and nvidia gpu a same time?
Usually with dual-GPU laptops that both have integrated/dedicated are switching. I.e., when more power is needed, the integrated kicks control over to the dedicated card and when less power is needed, the dedicated switches control over to the integrated.
So in short...no; at least not that I'm aware of. Not sure if it would be possible with an AMD APU + dedicated AMD GPU or not... but I know it wouldn't be possible with integrated Intel + dedicated nVidia or AMD.
Laptop: MSI GT70 2OC-059us | i7-4700MQ | 16GB | GTX 770m | 500GB SSD / 750GB HDD | 17.3" | Win10 Pro
Desktop: 4690k | 12GB g.Skill RipJaws | GTX 970 | 520hx | Z87X-UD4H | Corsair Vengeance C70 | Corsair H110 | Acer 25" | Acer 22" | Win10
Mobile: Samsung Galaxy Note 5
If I help you, or you just like what I said, rep me by clicking the under my post