Hello , I just build a computer and everything is working except I get no display from GPu, when I switch to onboard I get a display , I also try a different card and all slots and still no getting any display, the card LED's and fans are working but there is no display to monitor, pleas I need help don't know what else to do, I manage to install windows but it wont allow me to download GPU drives its said that there is no card install in system,, mother board is a Maximus VIII Hero GU is a GTX 1070 hybrid with a core i7 6700k and 16g of corsair memory