(Dell XPS 15) Nvidia card question

Hello i have just bought my new computer the l502x and enjoying it really much but i had a small little question: When i see on the site canyourunit so see if my computer can run a certain type of game its recognizing my Intel HD family card instead of my Nvidia 525m card can anyone tell me how to make it recognize or is just that the card isnt being used or whats the problem?

Ps:im a complete noob when it comes to these kind of question so please help me

Thank you