Lenovo y510p confusion

[actioncat]

Hello. I've owned my Lenovo Y510P laptop for nearly a year now. I was wondering if my laptop shipped with two graphics cards in it, or a single graphics card, since my system does not detect the second graphics card. It has a DVD Drive. Can anyone confirm?

 

[k1114]

Single, the dvd drive is where the second would go if you had another.