I recently got alienware amplifier and i plan to use it with aw 17r5. My friend got into issue where he is forced to use external display to use amp output. Nowhere aw has mentioned the necessity to buy external display with amp. As per all promos and tech sheets it was simple slap a card plug and play. On my frnd laptop it shows all 3 cards (intel gms, gtx 1070 and gtx 980ti) and only 1070 works which is onboard

Only in games like watchdog 2 where gpu selection is inside game he could switch between 1070 and 980ti. Any help pls.