Hello, Yes. Both displays will work. What I noticed was that if the internal display was the primary display, it used the laptop video for both screens. If the external monitor was the primary display, then the Nvidia card was used for both screens. I used the external monitor as the primary and the laptop as an extended screen. Worked flawlessly. I primarily use my setup for gaming, OSX and Windows. One benefit I never realized was how cool the laptop remains during extended gaming sessions. Good luck! One thing I forgot to mention is in Windows, the loss of control of the brightness for the laptop screen. I tried the sleep method, close the lid and reopen, but every time Windows would blue screen on me. I found a utility called SBright. It allows me to turn off the display without the laptop going to sleep. Touch a key or the trackpad and the internal diplay turns on again. Then the brightness controls work again. It isn't perfect but it works.