I am the guy on the lenovo forums that started the long threat about the ultrabay 750m5 cards not working on Y510p laptops (when bought separately). The problem is that if you bought non-sli version of the y510p 750m and then bought the ultrabay 750m5 card it is not being detected by the laptop. The problem has been figured out and basically Lenovo neutered the non-sli versions so they can't provided enough power to the ultrabay to support the second card so you are out of luck. You might be able to return the card or send back the entire laptop for a motherboard change. I did the later and they put the same motherboard back in so it didn't work for me. Eventually I returned the entire laptop for a new one directly from Lenovo with the SLI from factory and it works now.