is it possible to add second graphics card to y510 p non sli?

[nondescript]

I have been getting mixed responses from lenovo customer service chat so i am posting my question here. I bought this laptop recently. It comes with a single graphics card. I heard this model has ultrabay and you can add another graphics card. My question is is it true that you can add a second graphics card in this system with the help of ultrabay? Please let me know. I am confused if SLI and ultrabay refers to the same thing. If that is the case then this system is non sli. I appreciate your help.

http/shop.lenovo.com/us/en/laptops/lenovo/y-series/y510p/?sb=:000001C9:00011E0A:

 

[lantrich]

Yes it will sli using Ultrabay. But you will have to buy a 170w power adapter or it won't work.

 

[nondescript]

do you know which adapter i should buy?